Synonyms: 9,11-Secoestra-1,3,5(10)-trien-11-oicacid, 17b-hydroxy-3-methoxy-9-oxo-,acetate (7CI,8CI); Cyclopentaneacetic acid,2-(acetyloxy)-1-methyl-5-(1,2,3,4-tetrahydro-6-methoxy-1-oxo-2-naphthalenyl)-,[1S-[1a,2b,5b(R*)]]- (9CI); 3-Methoxy-9,11-seco-9-oxo-17b-acetoxyestra-1,3,5(10)-trien-11-oic acid