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21002-81-3

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21002-81-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21002-81-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,0 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21002-81:
(7*2)+(6*1)+(5*0)+(4*0)+(3*2)+(2*8)+(1*1)=43
43 % 10 = 3
So 21002-81-3 is a valid CAS Registry Number.

21002-81-3Downstream Products

21002-81-3Relevant articles and documents

CIRCULAR DICHROISM OF CYCLIC AMINO SUBSTITUTED Δ4-3-KETOSTEROIDS

Nogami, Yasuyoshi,Koga, Toshitaka

, p. 2274 - 2277 (2007/10/02)

The circular dichroism (CD) of various steroidal α,β-unsaturated ketones having cyclic amino substituents near the enone system has been studied and the spectra provide significant information regarding the position and configuration of the substituents.Keywords- steroid; amino-steroid; CD; n-Π* Cotton effect; Π-Π* Cotton effect; steroidal enone; α,β-unsaturated ketone

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