18090-56-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18090-56-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,0,9 and 0 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 18090-56:
(7*1)+(6*8)+(5*0)+(4*9)+(3*0)+(2*5)+(1*6)=107
107 % 10 = 7
So 18090-56-7 is a valid CAS Registry Number.
18090-56-7Relevant academic research and scientific papers
Stereochemistry of 13-Hydroxyprotoberberines, Their Derivatives, and a Protopine-Type Alkaloid
Iwasa, Kinuko,Sugiura, Makiko,Takao, Narao
, p. 4275 - 4280 (2007/10/02)
13C NMR and 1H NMR spectral analyses have been used to establish the conformational structure of ophiocarpine (1), epiophiocarpine (2), their acetates and corresponding N-quaternary salts, and allocryptopine (5).
