The microbial transformation of a steroidal alkaloid, dictyophlebine (1) with Rhizopus stolonifer (ATCC 10404) afforded three oxidized metabolites 2—4. Compound 2 was found to be a new product. These metabolites were structurally characterized on the basis of modern spectroscopic techniques. Their inhibitory activity towards acetyl- and butyrylcholinesterase has been evaluated and the new product 2 has been found to be more potent than the parent compound and other metabolites.
根瘤菌(Rhizopus stolonifer,A
TCC 10404)通过微
生物转化一种甾体
生物碱--
二烯丙基酚碱(1),产生了三种氧化代谢物 2-4。 发现化合物 2 是一种新产物。根据现代光谱技术对这些代谢物进行了结构鉴定。对它们对
乙酰胆碱酯酶和丁酰
胆碱酯酶的抑制活性进行了评估,发现新产物 2 比母体化合物和其他代谢产物更有效。