3-(Cyclopentyloxy)estra-1,3,5(10)-triene-16-alpha,17-alpha-diol diacetate Estra-1,3,5(10)-triene-16-alpha,17-alpha-diol, 3-(cyclopentyloxy)-, diacetate Estriol-3-cyclopentyl ether diacetate KG7397000