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71118-02-0

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71118-02-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71118-02-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,1,1 and 8 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 71118-02:
(7*7)+(6*1)+(5*1)+(4*1)+(3*8)+(2*0)+(1*2)=90
90 % 10 = 0
So 71118-02-0 is a valid CAS Registry Number.
InChI:InChI=1/C21H30O4/c1-12(22)21(25)11-17(24)18-15-5-4-13-10-14(23)6-8-19(13,2)16(15)7-9-20(18,21)3/h10,15-18,24-25H,4-9,11H2,1-3H3/t15-,16+,17-,18-,19+,20+,21+/m1/s1

71118-02-0Relevant articles and documents

15β-hydroxysteroids (Part VII). Steroids of the human perinatal period: The synthesis of steroid markers and their radioactive tracers

Reeder, Anthony Y.,Joannou, George E.

, p. 221 - 225 (2007/10/03)

We report the synthesis of 10 novel steroids obtained from 3β,15β- diacetoxy-17α-hydroxy-5-pregnen-20-one (1c) as intermediates in the synthesis of 15β-acetoxy-20,20-ethylenedioxy-17α-hydroxy-4-pregnen-3-one (6a) and its tritiated tracer 15β-acetoxy-20-20-ethylenedioxy-17α-hydroxy- 1,2,6,7-3-pregn-4-en-3-one (6d). The one pot interconversion of intermediate (6a) to 3β,15β,17α-trihydroxy-5-pregnen-20-one (1a) and 3α,15β,17α- trihydroxy-5β-pregnan-20-one (2a) provides a new and efficient approach to the synthesis of diagnostically important metabolites of the human neonate and a possible route in the synthesis of the tritated tracers 3β,15β,17α- trihydroxy-1,2,7-3H-pregn-5-en-20-one (1d) and 3α,15β,17α-trihydroxy- 1,2,6,7-3H-5β-pregnan-20-one (2b) for the development of new immunoassays. We also report in this investigation an alternative route in the synthesis of 15β,17α-dihydroxy-4-pregnen-3,20-dione (7a) an intermediate in the synthesis of human 15β-hydroxysteroid metabolites.

Chick oviduct progesterone receptor binding of 15β,17-dihydroxyprogesterone and its analogues

Baker,McMorris,Terry,Barrow,Villanueva

, p. 153 - 158 (2007/10/02)

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