99239-13-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99239-13-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,2,3 and 9 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 99239-13:
(7*9)+(6*9)+(5*2)+(4*3)+(3*9)+(2*1)+(1*3)=171
171 % 10 = 1
So 99239-13-1 is a valid CAS Registry Number.
99239-13-1Relevant articles and documents
SYNTHESIS OF PROTECTED PURPUROSAMINE B AND 6-EPIPURPUROSAMINE B
Yasuda, Nobuyoshi,Matsuda, Keiji,Tsutsumi, Hideo,Takaya, Takao
, p. 51 - 62 (2007/10/02)
In relation to the synthesis of antipseudomonal drugs, namely, gentamicin C2 and 3-de-O-methylsporaricin A, a protected purpurosamine B (15) and 6-epipurpurosamine B (13) were synthesized.The key intermediate, methyl 2,3,4,7-tetradeoxy-6-O-(met