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113947-56-1

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113947-56-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 113947-56-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,9,4 and 7 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 113947-56:
(8*1)+(7*1)+(6*3)+(5*9)+(4*4)+(3*7)+(2*5)+(1*6)=131
131 % 10 = 1
So 113947-56-1 is a valid CAS Registry Number.

113947-56-1Downstream Products

113947-56-1Relevant articles and documents

SYNTHESIS AND EVALUATION OF BROMOACETOXY 4-ANDROSTEN-3-ONES AS ACTIVE SITE-DIRECTED INHIBITORS OF HUMAN PLACENTAL AROMATASE

Numazawa, Mitsuteru,Tsuji, Masachika,Osawa, Yoshio

, p. 347 - 360 (2007/10/02)

2α-Bromoacetoxy (II), 6-bromoacetoxy (VII and X), and 19-bromoacetoxy (XII) derivatives of androstenedione and 17β-bromoacetoxy compounds (III, IV, XIII-XVI) were synthesized as potential affinity-labeling reagents for aromatase. 6α-Bromoacetoxy derivative VII was the most potent inhibitor of human placental microsomal aromatase activity among this series.Its inhibitory activity was higher than that of the parent 6α-hydroxy compound V, although other bromoacetates showed weaker inhibition of aromatase than the corresponding alcohols.The bromoacetates (except the 6β-bromoacetate X) inhibited aromatase activity in a time-dependent manner in the absence of NADPH, and the enzyme inactivation was blocked by the addition of androstenedione to the incubates.Kinetic analysis of the time- and concentration-dependent inhibition by the 6β-bromo-17β-bromoacetoxy compound XV gave an apparent Ki of 25 μM and Kinact of 0.027 min-1.

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