138505-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138505-20-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,5,0 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 138505-20:
(8*1)+(7*3)+(6*8)+(5*5)+(4*0)+(3*5)+(2*2)+(1*0)=121
121 % 10 = 1
So 138505-20-1 is a valid CAS Registry Number.
138505-20-1Relevant articles and documents
Synthesis of Larreantin, a Cytotoxic Napththoquinoid Sesquilignan from Larrea tridentata
Comber, Mark F.,Sargent, Melvyn V.
, p. 2783 - 2787 (2007/10/02)
Larreantin 1, a biogenetically unique cytotoxic naphthoquinoid sesquilignan has been synthesized by a convergent route.The key intermediate was 4,5-dihy
