4-Amino-5-(bromomethyl)-2-methylpyrimidine is a heterocyclic building block.1,2 It has been used in the synthesis of vitamin B1 analogs and thiaminephosphoric acid esters. |1. Abblard, J., Cronenberger, L., and Pacheco, H. Synthesis of the analogs of vitamin B1. Chim. Ther. 8(1), 98-110 (1973).|2. Leichssenring, G., and Joachim, S. The synthesis of thiaminephosphoric acid esters. Chem. Ber. 95, 767-772 (1962).

Carotenoid mixture is a mixture of carotenoids that contains the antioxidative and anti-inflammatory carotenoid capsanthin and the antioxidative vitamin A precursor β-carotene , as well as additional carotenoids and carotenoid esters.1,2,3,4 1.Kim, J.S., Lee, W.M., Rhee, H.C., et al.Red paprika (Capsicum annuum L.) and its main carotenoids, capsanthin and β-carotene, prevent hydrogen peroxide-induced inhibition of gap-junction intercellular communicationChem. Biol. Interact.254146-155(2016) 2.Narisawa, T., Fukaura, Y., Hasebe, M., et al.Prevention of N-methylnitrosourea-induced colon carcinogenesis in rats by oxygenated carotenoid capsanthin and capsanthin-rich paprika juiceProc. Soc. Exp. Biol. Med.224(2)116-122(2000) 3.Horie, S., Okuda, C., T., Y., et al.Purified canola lutein selectively inhibits specific isoforms of mammalian DNA polymerases and reduces inflammatory responseLipids45(8)713-721(2010) 4.Negishi, H., Ueda, Y., and Azuma, M.Antioxidant fat-soluble vitamins and lipid peroxides in serumJ. Clin. Biochem. Nutr.26227-234(1999)

Dicoumarol (Dicumarol) is a hydroxycoumarin originally isolated from molding sweet-clover hay, with anticoagulant and vitamin K depletion activities. Dicoumarol is a competitive inhibitor of vitamin K epoxidereductase; thus, it inhibits vitamin K recycling and causes depletion of active vitamin K in blood. This prevents the formation of the active form of prothrombin and several other coagulant enzymes, and inhibits blood clotting.

4-aminobenzoic acid is an organic acid with UV-absorbing and antifibrotic properties. When exposed to light, 4-aminobenzoic acid absorbs UV light and releases excess energy through a photochemical reaction, which may cause DNA damage.4-aminobenzoic acid also increases oxygen uptake at the tissue level and may enhance monoamine oxidase (MAO) activity to promote serotonin degradation, which in excess may lead to fibrotic Changes.