In the present research, the steroidal antiinflammatory topically used drug prednicarbate (1) was subjected to microbial biotransformation by Cunninghamella elegans. Prednicarbate (1) was transformed into various metabolites. One new and two known metabolites were purified named as prednisolone 17-ethylcarbonate (2) Prednisolone (3) and 4-(4-hydroxybenzyl)-2-(3-methylbut-2-enyl)phenyl methyl carbonate (4). The compound (4) was separated as a new compound and was not reported in literature. Its structure did not show resemblance with prednicarbate so possibly derived from fungal mass. Their structures were elucidated by using modern spectroscopic techniques e.g. 13C NMR, 1H NMR, HMQC, HMQC, COSY, NOESY and mass spectrometry e.g. EI-MS.
在本研究中,类
固醇抗炎外用药
泼尼卡酯(1)被梭菌进行了微
生物生物转化。
泼尼卡酯(1)被转化为多种代谢物。纯化出了一种新的和两种已知的代谢物,分别命名为
泼尼松龙 17-乙基
碳酸酯(2)、
泼尼松龙(3)和 4-(
4-羟基苄基)-2-(3-甲基丁-2-烯基)苯基甲基
碳酸酯(4)。化合物 (4) 是作为一种新化合物分离出来的,在文献中未见报道。它的结构与
泼尼卡酯不相似,因此可能来自真菌块。我们利用现代光谱技术(如 13C NMR、1H NMR、HMQC、HMQC、COSY、NOESY)和质谱技术(如 EI-MS)阐明了它们的结构。