503609-25-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 503609-25-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,3,6,0 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 503609-25:
(8*5)+(7*0)+(6*3)+(5*6)+(4*0)+(3*9)+(2*2)+(1*5)=124
124 % 10 = 4
So 503609-25-4 is a valid CAS Registry Number.
503609-25-4Relevant articles and documents
Synthesis of (±)-phloeodictine A1
Neubert, Bobbianna J.,Snider, Barry B.
, p. 765 - 768 (2007/10/03)
(Matrix presented) The antitumor antibiotic phloeodictine A1 (2) has been synthesized by a convergent seven-step route in 8% overall yield. The key step was the Eguchi aza-Wittig reaction of 6 to give 13 followed by a retro Diels-Alder reaction to liberat
