Alphitonin is a flavonoid that has been found in L. leptolepis wood.1 It is also a metabolic intermediate that is formed during the catabolism of quercetin by the human gut bacteria E. ramulus.2,3 |1. Chen, K., Ohmura, W., Doi, S., et al. Termite feeding deterrent from Japanese larch wood. Bioresour. Technol. 95(2), 129-134 (2004).|2. Braune, A., Gütschow, M., Engst, W., et al. Degradation of quercetin and luteolin by Eubacterium ramulus. Appl. Environ. Microbiol. 67(12), 5558-55567 (2001).|3. Jaganath, I.B., Mullen, W., Lean, M.E.J., et al. In vitro catabolism of rutin by human fecal bacteria and the antioxidant capacity of its catabolites. Free Radic. Biol. Med. 47(8), 1180-1189 (2009).

Desmethyl Ketoprofen是一个片段分子，CAS号为22071-22-3，可作为分子拼接、扩展和修饰的重要骨架，为新型候选药物的设计与筛选提供结构基础与研究工具，常用于药物发现、药物合成等相关研究。

Ritalinic acid是一个片段分子，CAS号为19395-41-6，可作为分子拼接、扩展和修饰的重要骨架，为新型候选药物的设计与筛选提供结构基础与研究工具，常用于药物发现、药物合成等相关研究。

Risperidone E-oxime is an impurity of Risperidone, a serotonin 5-HT2 receptor blocker, P-glycoprotein inhibitor, and potent dopamine D2 receptor antagonist (Kis of 4.8 and 5.9 nM for 5-HT2A and dopamine D2 receptors, respectively).

Hydroxydehydro nifedipine carboxylate is a metabolite of nifedipine .1 1.Roosemalen, M.C.M., Soons, P.A., Funaki, T., et al.High-performance liquid chromatographic determination of the polar metabolites of nifedipine in plasma, blood and urineJ. Chromatogr.565(1-2)516-522(1991)

trans-hydroxy Glimepiride is an active metabolite of the sulfonylurea glimepiride .1It is formed from glimepiride primarily in the liver by the cytochrome P450 (CYP) isoform CYP2C9. 1.Langtry, H.D., and Balfour, J.A.Glimepiride. A review of its use in the management of type 2 diabetes mellitusDrugs55(4)563-584(1998)