Synonyms: Estrololactone;604-82-0;3-Hydroxy-D-homo-17a-oxaestra-1,3,5(10)-trien-17-one;(4as,4br,10bs,12as)-8-hydroxy-12a-methyl-3,4,4a,4b,5,6,10b,11,12,12a-decahydro-2h-naphtho[2,1-f]chromen-2-one;AC1L5CYZ;C14496;KST-1A7302;NSC12172;AR-1A5528;NSC 12172;NSC-12172;17a-Oxa-D-homoestra-1,5(10)-trien-17-one, 3-hydroxy-;17a-Oxa-D-homoestra-1,3,5(10)-trien-17-one, 3-hydroxy-;13,3,5(10)-trien-17-oic acid, 3,13.alpha.-dihydroxy-, .delta.-lactone;(4aS,4bR,10bS,12aS)-8-hydroxy-12a-methyl-4,4a,4b,5,6,10b,11,12-octahydro-3H-naphtho[2,1-f]chromen-2-one