55724-73-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 55724-73-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,7,2 and 4 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 55724-73:
(7*5)+(6*5)+(5*7)+(4*2)+(3*4)+(2*7)+(1*3)=137
137 % 10 = 7
So 55724-73-7 is a valid CAS Registry Number.
InChI:InChI=1/C8H16O3/c1-2-3-6-11-7-4-5-8(9)10/h2-7H2,1H3,(H,9,10)
55724-73-7Relevant articles and documents
LONG-ACTING CONTRACEPTIVE AGENTS: ESTERS OF NORETHISTERONE WITH ALKOXY- AND HALOGENO-SUBSTITUTED CARBOXYLIC ACIDS
Shafiee, A.,Vossoghi, M.,Francisco, C. G.,Freire, R.,Hernandez, R.,et al.
, p. 285 - 290 (2007/10/02)
The chemical synthesis and physical data of several new esters of norethisterone (17α-ethynyl-17β-hydroxyestr-4-en-3-one) are reported, which contain either a chloro- or an alkoxy-group as a substituent in the acid side-chain.