129661-80-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129661-80-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,6,6 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 129661-80:
(8*1)+(7*2)+(6*9)+(5*6)+(4*6)+(3*1)+(2*8)+(1*0)=149
149 % 10 = 9
So 129661-80-9 is a valid CAS Registry Number.
129661-80-9Relevant articles and documents
SYNTHESIS OF 2,4-DIHYDROPYRROLOPYRROLES AND 4,6-DIHYDRO-2H-DIPYRROLOPYRROLES
Sha, Chin-Kang,Liu, Jia-Ming,Chiang, Ray-Kuang,Wang, Sue-Lein
, p. 603 - 609 (2007/10/02)
The labile heterocyclic ring systems, 2,4-dihydropyrrolopyrrole 1 and 4,6-dihydro-2H-dipyrrolopyrrole 2, were prepared readily by the phosphineiminealkylidenemalonate cyclization reaction or the retro-malonate addition reaction.An X-