55056-56-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 55056-56-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,0,5 and 6 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 55056-56:
(7*5)+(6*5)+(5*0)+(4*5)+(3*6)+(2*5)+(1*6)=119
119 % 10 = 9
So 55056-56-9 is a valid CAS Registry Number.
InChI:InChI=1/C18H20O3/c1-17-7-6-13-12-3-2-11(19)8-10(12)9-16-18(13,21-16)14(17)4-5-15(17)20/h2-3,8,13-14,16,19H,4-7,9H2,1H3/t13-,14-,16+,17+,18+/m1/s1
55056-56-9Relevant articles and documents
An effective approach to B-ring aromatization of equilin
Cao, Zhisong,Liehr, Joachim G.
, p. 145 - 155 (2007/10/03)
Epoxidation of equilin followed by rearrangement-elimination catalyzed by either proton acids or Lewis acids generates an estrogen with an aromatic B-ring. This procedure represents an effective method for the conversion of an equilin nucleus to an equilenin nucleus.