(5α,7α,8α)-2-chloro-10,10-ethylenedioxy-6,7,8,9-tetrahydro-5,8-methano-5H-benzo[7]annulene-7-carboxylic acid 在
lead(IV) acetate 、 sodium tetrahydroborate 、 copper diacetate 作用下,
生成
(5α,8α)-2-chloro-10,10-ethylenedioxy-8,9-dihydro-5,8-methano-5H-benzo[7]annulene