Not Less Than - 95%
13-Ethyl-11-methylidenegon-4-en-17-one; 13-Ethyl-11-methylene-gon-4-en-17-one; 13β-Ethyl-11-methylenegon-4-en-17-one;13-Ethyl-11-methylenegon-4-en-17-one; Desogestrel Related Compound D (USP);