Deoxylapachol has anti-wood rot activity, it can inhibit the brown rot fungi Gloeophyllum sepiarium CBS 353.74 and Gloeophyllum trabeum CBS 318.50 and the white rot fungi Merulius tremellosus CBS 280.73 and Phlebia brevispora CBS 509.92. It also can induc

Menadione (Vitamin K3) is a synthetic naphthoquinone without the isoprenoid side chain and biological activity, but can be converted to active vitamin K2, menaquinone, after alkylation in vivo.

β,β-Dimethylacrylalkannin is a natural product isolated from Arnebia nobilis Reichb.f, increases collagen and involucrin content in skin cells.

Plumbagin (Plumbaein) is a yellow dye, formally derived from naphthoquinone. It is named after the plant genus Plumbago, from which it was originally isolated. It is also commonly found in the carnivorous plant genera Drosera and Nepenthes. It is also a component of the black walnut drupe.

Primin is a natural product stored in trichomes on the leaves and stems of Primula obconica, exhibiting antimycobacterial and strong antineoplastic actions.

2-Hydroxy-3-methylbutyric acid is a structural analog of GHB, a naturally occurring substance found in the central nervous system, and a nootropic.

Isobutylshikonin exhibits obvious antioxidant activities , it exerts very good radical scavenging activities toward ABTS+ but shows moderate inhibition of DPPH·.

Homoembelin (2,5-dihydroxy-3-nonyl-1,4-benzoquinone) is a pigment from E. ribes and C. monocarpus that has antibacterial effects and can be used to study multidrug-resistant bacterial infections.

Vitamin K1 (Phylloquinone) a fat-soluble, naturally occurring vitamin with antihemorrhagic and prothrombogenic activity.

During hypoxia in rats, levels of α-tocopherylquinon have been found to rise. alpha-Tocopherolquinone (Metarene) is reported to downregulate the respiratory activity of mitochondria. alpha-Tocopherolquinone has also displayed antioxidant activities after it is reduced to tocopherylhydroquinone.

Protohypericin, a naphthodianthrone derivative found in the plant Hypericum perforatum, exhibits photocytotoxicity and is utilized in tumor necrosis targeted radiotherapy through its radioiodinated form.

Coenzyme Q10 (CoQ10) (ubiquinone) is a naturally occurring compound, acting as the electron carrier in the mitochondrial respiratory chain.

Physcion (Physcione) (Parietin) is an anthraquinone isolated from traditional Chinese medicine Radix et Rhizoma Rhei, acts as an inhibitor of 6-phosphogluconate dehydrogenase, with an IC50 and a Kd of 38.5 μM and 26.0 μM, respectively. Physcion (Parietin) exhibits laxative, hepatoprotective, anti-inflammatory, anti-microbial, anti-proliferative and anti-tumor effects.

1. Deoxyshikonin (Arnebin 7) may be a new drug candidate for wound healing and treatment of lymphatic diseases. 2. Deoxyshikonin enhances the ability of human dermal lymphatic microvascular endothelial cells (HMVEC-dLy) to undergo time-dependent in vitro cord formation. 3. Deoxyshikonin and dodecyl gallate show significantly synergic antimicrobial activity with penicillin in vivo and in vitro, and can effectively reduce nasopharyngeal and lung colonization caused by different penicillin-resistant pneumococcal serotypes.

Menaquinone-4 (Vitamin K2) is a vitamin K compound used as a hemostatic agent, and also as adjunctive therapy for the pain of osteoporosis.

Rhein (NSC 38629) is an anthraquinone compound extracted from Polygonaceae Rheum Officinale with anti-inflammation and antitumor activities.

1. Acetylshikonin exhibits weak cytotoxicity against human umbilical vein endothelial cells (HUVECs) with IC5 of over 2 microM, exhibits the antiangiogenic and antitumorigenic effects by suppressing proliferation and angiogenic factors. 2. Acetylshikonin inhibits the generation of NADPH oxidase complex in the activation of respiratory burst of PMNs, but does not directly inhibit the activity of NADPH oxidase already generated. 3. Certain shikonin derivatives(such as Acetylshikonin) act as modulators of the Nur77-mediated apoptotic pathway and identify a new shikonin-based lead that targets Nur77 for apoptosis induction. 4. Acetylshikonin, shikonin, and alkannin have accelerative effect on the proliferation of granulation tissue in rats. 5. Acetylshikonin has inhibitory effect on the edematous response is due neither to the release of steroid hormones from the adrenal gland nor to the glucocorticoid activity, but probably partly to the suppression of mast cell degranulation and partly to protection of the vasculature from mediator challenge. 6. Acetylshikonin induces apoptosis of hepatitis B virus X protein-expressing human hepatocellular carcinoma cells via endoplasmic reticulum stress.

Oosporein is a mycotoxin produced by Trichoderma reesei with antimicrobial, antiviral and insecticidal activities, inhibits P. infestans, inhibits herpes simplex virus type 1 DNA polymerase, and can be used in the study of viral infections.

Alizarin (Mordant Red 11), a red dye derived from the roots of plants of the madder genus, inhibits P450 isoform CYP1A1( IC50 = 6.2 μM), CYP1A2 (IC50 =10.0 μM )and CYP1B1(IC50 = 2.7 μM).

2,6-Dimethoxyquinone is a plant derived liposuction inducing factor. It has antilipemic, anticancer, antibacterial, antimalarial and anti-inflammatory properties.

(-)-Alkannin (Shikonin) is a natural red naphthoquinone pigment, has antimicrobial, anti-tumor, and anti-inflammatory effects; a purified shikonin preparation is widely used for the production of medicinals, cosmetics, and some food products; shikonin also enters into the antiinflammatory ointment and cream compositions used for the treatment of burns. It can suppress the cell viability, adhesion, invasion and migratory ability of MGC-803 cells through TLR2- or NF-κB-mediated pathway.

Embelin (Embelic acid), isolated from the Japanese Ardisia herb, is an inhibitor of the X-linked inhibitor of apoptosis (IC50: 4.1 uM).

Demeclocycline (Declostatin) is a tetracycline antibiotic produced by a strain of Streptomyces aureofaciens.Demeclocycline has antimicrobial activity and inhibits the action of vasopressin on the renal tubules, leading to diuresis. Demeclocycline can be used to induce diuresis and acute renal failure.

1. β,β-Dimethylacrylshikonin (Dimethylacrylshikonin) is a promising agent for developing an improved strategy for radiotherapy against tumors. (a) Injection of Dimethylacrylshikonin combined with IR treatment significantly suppressed tumor growth of the HCT-116 xenograft. (b) Dimethylacrylshikonin significantly suppressed the growth of H(22) transplantable hepatoma, and induced the activation of caspase-3 . (c) Dimethylacrylshikonin inhibited growth of gastric cancer SGC-791 cells by inducing ERK signaling pathway. 2. Dimethylacrylshikonin inhibits the proliferation of MCF-7 cells in vitro by inducing apoptosis through the downregulation of Bcl-2, upregulation of Bax and partial inactivation of the NF-κB pathway.

Juglone (Regianin) is a natural naphthoquinone found in the black walnut (J. nigra) and other plants in the Juglandaceae family. Juglone also irreversibly inhibits peptidyl-prolyl cis trans isomerases of the parvulin family, including human Pin1, yeast Ess1 Ptf1, and E. coli parvulin (Ki = 55.9 nM). Juglone also blocks transcription by RNA polymerases I, II, and III (IC50s = 2-7 μM) and attenuates kidney fibrosis in rats treated with unilateral ureteral obstruction, both through Pin1-independent mechanisms.

Lapachol (CI75490) has antimicrobial properties against many pathogens. It has anti-inflammatory, analgesic and antibiotic properties. It is an inhibitor of epithelial tumors in Drosophila melanogaster heterozygote.

(Rac)-Arnebin 1 (beta, beta-dimethylacrylshikonin) has anti-tumor, anti-inflammatory, anti-immune deficiency and protecting liver.

Aloe emodin (Rhabarberone) is an interferon-inducing agent, for JEV （IC50=1 μg mL） and EV71（IC50=0.33 μg mL ）.

Anthragallol (1,2,3-Trihydroxyanthraquinone) shows cytotoxicity by binding to DNA.Anthragallol can be used as an analytical reagent for the production of brown pickle colorants.

Xyloidone (NSC-106453) exhibits antifungal activity and completely inhibits the mycelial growth of B. cinerea, Colletotrichum acutatum Simmonds, Colletotrichum gloeosporioides Simmonds, M. grisea, and Pythium ultimum Trow over a range of 0.4-33.3 mg L.

Thymoquinone (NSC 2228) is a compound be found in herbs and spices with anti-inflammatory and anti-oxidant effects.

Lawsone methyl ether (2-Methoxy-1,4-naphthoquinone) induces apoptosis in A549 cells independently of cell cycle arrest, mediated by JNK and p38 MAPK signaling pathways. These pathways are activated due to oxidative DNA damage from increased ROS generation in MNQ-treated A549 cells.

Rapanone (2,5-Dihydroxy-3-tridecyl-[1,4]benzoquinone) is a natural benzoquinone that is a potent and selective inhibitor of human synovial PLA2.

Danthron (Antrapurol) is a natural product, regulates glucose, and lipid metabolism by activating AMPK.

Lawsone (Hennotannic acid) (2-hydroxy-1,4-naphthoquinone), also known as hennotannic acid, is a red-orange dye present in the leaves of the henna plant (Lawsonia inermis) as well as in the flower of water hyacinth (Eichhornia crassipes).

1,4-Anthraquinone is an anticancer drug that blocks nucleoside transport, inhibits macromolecule synthesis, induces DNA fragmentation, and decreases the growth and viability of L1210 leukemic cells in the same nanomolar range as daunorubicin in vitro.1,4-

Beta-Acetoxyisovalerylshikonin is a naphthoquinone derivative extracted from Arnebia euchroma.

α-Lapachone has antineoplastic activity, it shows an approximately trypanocidal activity against Trypanosoma cruzi.

2,5-dimethoxycyclohexa-2,5-diene-1,4-dio (Thermophillin) is a natural product. The redox cycle of 2,5-dimethoxybenzoquinone is a source of reducing equivalent for the regeneration of Fe2+ and H2O2 in brown rot fungal decay of wood.

Ketoisophorone (2,6,6-Trimethyl-2-cyclohexene-1,4-dione) is the major ingredients of saffron spice. It is a cyclic olefin and was reported as a product of the thermal degradation of β-carotene in aqueous suspension.

2-Hydroxy-1-methoxyanthraquinone is a natural product isolated from Morinda lucida Benth. (Rubiaceae) with antimicrobial activity.

Gambogellic acid is an xanthone compound obtained from Garcinia cambogia and processed Gambog, is antitumor activity and cytotoxicity.

Emodin 6-O-β-D-glucoside (Glucoemodin) can protect barrier integrity and inhibit HMGB1-mediated inflammatory responses, which suggests a potential use as a therapy for sepsis or septic shock. Emodin 6-O-beta-D-glucoside has anti-inflammatory activities and also may have significant therapeutic benefits against diabetic complications and atherosclerosis.

Chrysophanein (Chrysophanol 1-O-glucoside) is a hydroxyquinone compound from Aloe vera with antibacterial, antifungal, and antioxidant activity.

DNHP (Dihexyl phthalate) is a plasticizer that is reproductively and developmentally toxic and decomposes PAE.

4-Hydroxysapriparaquinone Compound isolated from the roots of Salvia prionitis Hance. with potential anticancer activity.

Salvisyrianone is a diterpene isolated from Cryptomeria taiwanensis and S. syriacus with potential antihypertensive activity and antitumor activity.

2-Hydroxy-3-(hydroxymethyl)anthraquinone exhibits quinone reductase (QR)- inducing activity in Hepa lclc7 cells, with the concentration required to double QR activity of 0.94 microM.