O-ethyl-carbonic 5-ethyl-2,4-dimethyl-pyrrole-3-carboxylic anhydride 、
箭毒蛙毒素A 在
sodium hydroxide 、
氯甲酸乙酯 作用下,
以
氯仿 为溶剂,
生成 1-(9,12-dihydroxy-2,11a-dimethyl-1,2,3,4,7a,8,9,10,11,11a,12,13-dodecahydro-7H-9,11b-epoxy-13a,5a-prop[1]enophenanthro[2,1-f][1,4]oxazepin-14-yl)ethyl 5-ethyl-2,4-dimethyl-1H-pyrrole-3-carboxylate