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(+)-(2S,3aR,8aS)-3a-Allyl-1,2-bis(methoxycarbonyl)-8-(phenylsulfonyl)-1,2,3,3a,8,8a-hexahydropyrrolo<2,3-b>indole is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

157989-22-5

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157989-22-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157989-22-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,9,8 and 9 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 157989-22:
(8*1)+(7*5)+(6*7)+(5*9)+(4*8)+(3*9)+(2*2)+(1*2)=195
195 % 10 = 5
So 157989-22-5 is a valid CAS Registry Number.

157989-22-5Relevant academic research and scientific papers

Chemistry of cyclic tautomers of tryptophan: Formation of a quaternary center at C3a and total synthesis of the marine alkaloid (+)-ent-debromoflustramine B

Bruncko,Crich,Samy

, p. 5543 - 5549 (1994)

A diastereoselective synthesis of the unnatural (±)-enantiomer of the marine alkaloid (-)-debromoflustramine B (1) from a cyclic tautomer (9) of L-tryptophan is described. The optical rotation of the synthetic 1 is opposite to that of the natural material

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