Estradiol Valerate EP Impurity I

Chemical Name: (1S,3aS,3bR,10aR,10bS,13S,13aS,15aS,18bS,20aS)-13a,17,17,20a-tetramethyl-2,3,3a,3b,4,5,9,10,10a,10b,11,12,13,13a,14,15,15a,17,18b,19,20,20a-docosahydro-1H-bis(cyclopenta[5,6]naphtho)[1,2-b:2ʹ,1ʹ-i]xanthene-1,13-diyl dipentanoate (as per EP)