Estradiol Valerate EP Impurity E Catalogue C206535 CAS 63042-28-4 M.W 440.62 M.F C28H40O4 Specifications FAQs (8R,9S,13S,14S,17S)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diyl dipentanoate