6-[2-[(5,7-Dihydroxy-2-methyl-4-oxochromen-6-yl)methylideneamino]ethyliminomethyl]-5,7-dihydroxy-2-methylchromen-4-one 、
zinc diacetate 、
水 在
NH
4OH 作用下,
以
乙醇 为溶剂,
以90%的产率得到2,5,10,13-tetramethyl-4,11-dimethylene-1,4,7,8,11,14,16,17-octahydrocyclopenta[1,2-b:1,5-b']dianthracene compound with propane (1:1)