103742-75-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 103742-75-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,7,4 and 2 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 103742-75:
(8*1)+(7*0)+(6*3)+(5*7)+(4*4)+(3*2)+(2*7)+(1*5)=102
102 % 10 = 2
So 103742-75-2 is a valid CAS Registry Number.
InChI:InChI=1/C20H28O2/c1-12-10-13-11-14(21)6-7-15(13)16-8-9-20(2)17(19(12)16)4-3-5-18(20)22/h3,5,11-12,15-19,22H,4,6-10H2,1-2H3/t12-,15+,16-,17?,18+,19-,20+/m1/s1
103742-75-2Relevant articles and documents
Synthesis and testing of 17aβ-hydroxy-7α-methyl-D-homoestra-4,16-dien-3-one: a highly potent orally active androgen
Avery, Mitchell A.,Tanabe, Masato,Crowe, David F.,Detre, George,Peters, Richard H.,Chong, Wesley K. M.
, p. 59 - 64 (2007/10/02)
The title compound, 17aβ-hydroxy-7α-methyl-D-homoestra-4, 16-dien-3-one (3), was synthesized in five steps (17percent overall yield) from 7α-methylestrone methyl ether (5) and was found to possess oral androgenic activity, in excess of other known androgens, without using 17α-alkyl substitution. (Steroids 55:59-64, 1990)