81780-74-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81780-74-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,8 and 0 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81780-74:
(7*8)+(6*1)+(5*7)+(4*8)+(3*0)+(2*7)+(1*4)=147
147 % 10 = 7
So 81780-74-7 is a valid CAS Registry Number.
81780-74-7Relevant articles and documents
SYNTHESIS OF 3-OXYGENATED 13-NORHELIANGOLIDES
Kuroda, Chiaki,Hirota, Hiroshi,Takahashi, Takeyoshi
, p. 249 - 252 (1982)
Optically active - and -3-methoxymethoxy-13-nor-1(10),4-germacradieno-12,6-lactones, key synthetic intermediates for 3-oxygenated heliangolides, were synthesized from (-)-carvone.