The CAS Registry Mumber 78221-69-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,2,2 and 1 respectively; the second part has 2 digits, 6 and 9 respectively. Calculate Digit Verification of CAS Registry Number 78221-69: (7*7)+(6*8)+(5*2)+(4*2)+(3*1)+(2*6)+(1*9)=139 139 % 10 = 9 So 78221-69-9 is a valid CAS Registry Number.
Synthesis of oxytocin, arginine-vasopressin and its deamino-analogue using 2,4,6-trimethylbenzyl group for protection of the cysteine sulfur
Brtnik,Krojidlo,Barth,Jost
, p. 286 - 299 (1981)
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Get Best Price for78221-69-9benzyloxycarbonyl-S-(2,4,6-trimethylbenzyl)-L-cysteinyl-O-tert-butyl-L-tyrosyl-L-isoleucyl-L-glutaminyl-L-asparaginyl-S-(2,4,6-trimethylbenzyl)-L-cysteinyl-L-prolyl-L-leucyl-glycine amide