135821-90-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 135821-90-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,8,2 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 135821-90:
(8*1)+(7*3)+(6*5)+(5*8)+(4*2)+(3*1)+(2*9)+(1*0)=128
128 % 10 = 8
So 135821-90-8 is a valid CAS Registry Number.
InChI:InChI=1/C28H46O3/c1-21-19-30-26(4,5)31-20-23(21)13-12-22-11-10-17-28(7)24(22)14-18-27(28,6)16-9-8-15-25(2,3)29/h12-13,24,29H,1,8-11,14-20H2,2-7H3/b22-12+,23-13-/t24-,27-,28-/m1/s1
135821-90-8Relevant articles and documents
[1,7]-Sigmatropic hydrogen shifts of A-norvitamin D analogues: Ring size and substituent effects on the provitamin D-vitamin D equilibrium
Enas, Joel D.,Shen, Giin-Yuan,Okamura, William H.
, p. 3873 - 3881 (2007/10/02)
The [1,7]-sigmatropic hydrogen shift of the 11α-OH-A-norprevitamin D analogue 9 and its 11β-epimer 10 to the vitamin forms 24 and 25, respectively, was determined to be ~20 and ~10 times faster than that of provitamin D3 (1) to vitamin D3