The four desethyl analogues of aetioporphyrin-III have been synthesised by the biladiene route; h.p.l.c. comparisons showed that the desethylaetioporphyrin obtained from petroleum is the C-ring isomer (3c).
通过双二烯途径合成了四倍的
卟啉-III的去乙基类似物。hplc比较显示,从石油中获得的去乙基乙酰
卟啉为C环异构体(3c)。