143653-85-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143653-85-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,6,5 and 3 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 143653-85:
(8*1)+(7*4)+(6*3)+(5*6)+(4*5)+(3*3)+(2*8)+(1*5)=134
134 % 10 = 4
So 143653-85-4 is a valid CAS Registry Number.
143653-85-4Relevant articles and documents
A synthesis of the tetraene fragment of calyculins as its antipodal form
Matsubara,Nakao,Hamada,Shioiri
, p. 4187 - 4190 (1992)
The antipodal form 2 of the tetraene fragment, the C1-C12 portion, of calyculins (1) has been synthesized by use of the stereoselective hydrogenation of the butenolide 6 followed by the successive Wittig-type chain elongation of the lactol 9 as key steps.
