203922-27-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203922-27-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,9,2 and 2 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 203922-27:
(8*2)+(7*0)+(6*3)+(5*9)+(4*2)+(3*2)+(2*2)+(1*7)=104
104 % 10 = 4
So 203922-27-4 is a valid CAS Registry Number.
203922-27-4Relevant academic research and scientific papers
Preparation method of ecteinascidin-743 intermediate
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, (2018/08/04)
The invention relates to a preparation method of an ecteinascidin-743 intermediate. Specifically, the invention especially relates to a preparation method of synthesizing the ecteinascidin-743 intermediate as shown in formula I. The method comprises the f
