3,4-Dimethoxybenzyl alcohol is a secondary metabolite of lignin-degrading fungi and is commonly used as a non-phenolic substrate to measure ligninolytic activity.Veratryl alcohol protects lignin peroxidase (LiP) from inactivation by H2O2 and prevents accumulation of LiP III compounds[3].

2,4-Dihydroxypyridine is a pyridine derivative that acts as a chelating agent binding to metal ions and forming complexes. It is used as a reagent for determining the concentration of various ions, such as calcium, magnesium and phosphate. It is also used to measure the rate of enzyme-catalyzed reactions. It is also used for the detection and quantification of proteins, carbohydrates and other biomolecules.

2-(Methylamino)benzoic acid, the primary metabolite of methyl-N-methylanthranilates (MMA), results from the conversion of the ester group in MMA. This compound, extractable from citrus fruits and possessing potential analgesic activity, was utilized to measure MMA metabolic levels in rat liver [1].

Pregnanediol (5Beta-Pregnane-3Alpha,20alpha-Diol) is an inactive metabolite of PROGESTERONE by reduction at C5, C3, and C20 position. Pregnanediol(5Beta-Pregnane-3Alpha,20alpha-Diol) has two hydroxyl groups, at 3-alpha and 20-alpha. It is detectable in URINE after OVULATION and is found in great quantities in the pregnancy urine.

4-Aminohippuric Acid is the glycine amide of 4-aminobenzoic acid. Its sodium salt is used as a diagnostic aid to measure effective renal plasma flow (ERPF) and excretory capacity.

Taurohyodeoxycholic acid (THDCA) is a taurine-conjugated form of the secondary bile acid hyodeoxycholic acid .1THDCA decreases the size and weight of human gallstonesin vitro. It increases bile flow, biliary cholesterol secretion, and biliary lipid secretion in rats.2Co-administration of THDCA with taurochenodeoxycholic acid prevents TCDCA-induced hepatotoxicity, increasing bile flow as well as biliary acid and phospholipid secretion in rats.3THDCA also reduces myeloperoxidase activity, expression of TNF-α and IL-6, and colonic damage in a mouse model of TNBS-induced ulcerative colitis.4Taurohyodeoxycholic acid MaxSpec standard is a quantitative grade standard of taurohyodeoxycholic acid (sodium salt) that has been prepared specifically for mass spectrometry and related applications where quantitative reproducibility is required. The solution has been prepared gravimetrically and is supplied in a deactivated glass ampule sealed under argon. The concentration was verified by comparison to an independently prepared calibration standard. Verified concentration is provided on the certificate of analysis. This taurohyodeoxycholic acid MaxSpec standard is guaranteed to meet identity, purity, stability, and concentration specifications and is provided with a batch-specific certificate of analysis. Ongoing stability testing is performed to ensure the concentration remains accurate throughout the shelf life of the product.Note: The amount of solution added to the vial is in excess of the listed amount. Therefore, it is necessary to accurately measure volumes for preparation of calibration standards. Follow recommended storage and handling conditions to maintain product quality.