2,12-Methano-1H-benzo(b)naphtho(2,1-d)pyran-4(4aH)-one, 2,3,10b,11,12,12a-hexahydro-1,2,4a,8-tetrahydroxy-11,11-dimethyl-, (1R-(1alpha,2beta,4abeta,10bbeta,12alpha,12abeta))- 2618-41-9 Mirestrol