9-Hydroxy-4-methyl-2-acetyl-4,10b-propano-2,3,4,4a,5,6,6a,7,8,9,10a-dodekahydro-1H-benz
isochinolin-carbonsaeure-(6a) 在
硫酸 作用下,
以
甲醇 为溶剂,
生成 9-Hydroxy-4-methyl-2-acetyl-4,10b-propano-2,3,4,4a,5,6,6a,7,8,9,10,10a-dodecahy-dro-1H-benzisochinolin-carbonsaeure-(6a)-lacton