81755-50-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81755-50-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,5 and 5 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81755-50:
(7*8)+(6*1)+(5*7)+(4*5)+(3*5)+(2*5)+(1*0)=142
142 % 10 = 2
So 81755-50-2 is a valid CAS Registry Number.
81755-50-2Relevant academic research and scientific papers
IMPROVED SYNTHESIS OF 3'-NOR-1-OXACEPHEMS
Aoki, Tsutomu,Minami, Kyoji,Kubota, Tadatoshi,Hamashima, Yoshio,Nagata, Wataru
, p. 201 - 209 (2007/10/02)
Several improved synthetic routes to 7α-unsubstituted and 7α-methoxylated 3'-nor-1-oxacephems, 3 and 4, from 7α-benzoylamino-3-methylene-1-oxacepham 2 were established.
