55256-27-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 55256-27-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,2,5 and 6 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 55256-27:
(7*5)+(6*5)+(5*2)+(4*5)+(3*6)+(2*2)+(1*7)=124
124 % 10 = 4
So 55256-27-4 is a valid CAS Registry Number.
InChI:InChI=1/C17H21NO2/c1-19-13-6-5-10-9-12-11-3-2-4-14-17(11,7-8-18-12)15(10)16(13)20-14/h5-6,11-12,14,18H,2-4,7-9H2,1H3/t11-,12+,14-,17+/m0/s1
55256-27-4Relevant articles and documents
Synthesis of (-)-homogalanthamine from naltrexone
Yamamoto, Naoshi,Fujii, Hideaki,Imaide, Satomi,Hirayama, Shigeto,Nemoto, Toru,Inokoshi, Junji,Tomoda, Hiroshi,Nagase, Hiroshi
, p. 2257 - 2260 (2011/06/11)
Acetylcholinesterase inhibitor (-)-homogalanthamine 3 was synthesized from μ opioid antagonist naltrexone (2) in 16% total yield. The synthesis features Grob fragmentation as a key reaction, which was especially accelerated in the presence of 15-crown-5.
