(3,11-dimethoxy-15,16-dihydro-cyclopenta[
a]phenanthren-17-yliden)-acetic acid ethyl ester 在
palladium on activated charcoal 、
乙醇 作用下,
200.0~220.0 ℃
、6.37 MPa
条件下,
生成
(3,11-dimethoxy-16,17-dihydro-15H-cyclopenta[a]phenanthren-17-yl)-acetic acid ethyl ester