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205940-66-5

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205940-66-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 205940-66-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,9,4 and 0 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 205940-66:
(8*2)+(7*0)+(6*5)+(5*9)+(4*4)+(3*0)+(2*6)+(1*6)=125
125 % 10 = 5
So 205940-66-5 is a valid CAS Registry Number.

205940-66-5Relevant articles and documents

Synthesis of 2-phenylbenzofuran derivatives as testosterone 5α- reductase inhibitor

Ishibashi, Koki,Nakajima, Katsuyoshi,Sugioka, Yuki,Sugiyama, Mitsuo,Hamada, Takakazu,Horikoshi, Hiroyoshi,Nishi, Takahide

, p. 226 - 240 (2007/10/03)

A series of 2-phenylbenzofuran derivatives with a carbamoyl, alkylamino, or alkyloxy group at the 5 or 6 position of the benzofuran ring were synthesized and evaluated for rat and human testosterone 5α-reductase inhibitory activities in vitro. Against rat enzyme, the carbamoyl derivatives had more potent inhibitory activities than the alkylamino or alkyloxy derivatives, and the 6-carbamoyl derivatives tended to be more potent than the 5-carbamoyl derivatives. Against human enzyme, the 6-substituted derivatives had more potent inhibitory activities than the 5-substituted derivatives. The 6-carbamoyl and 6-alkylamino derivatives tended to show stronger inhibitory activities against human type 1 enzyme than against type 2 enzyme, but they were not largely selective.

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