Cas 189190-72-5,13-β-chloro-7-(triethylsilyl)-A-nor-baccatin III

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Check Digit Verification of cas no

The CAS Registry Mumber 189190-72-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,1,9 and 0 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 189190-72:
(8*1)+(7*8)+(6*9)+(5*1)+(4*9)+(3*0)+(2*7)+(1*2)=175
175 % 10 = 5
So 189190-72-5 is a valid CAS Registry Number.

189190-72-5Upstream product

115437-21-3 7-(triethylsilyl)baccatin III

189190-72-5Downstream Products

189190-72-5Relevant academic research and scientific papers

Synthesis and biological evaluation of amide-linked A-norpaclitaxels

Chordia, Mahendra D.,Kingston, David G. I.

, p. 5699 - 5710 (1997)

A novel amide-linked A-norpaclitaxel 3a and two 2-aroyl analogs 3b and 3c were prepared from 10-deacetyl baccatin III. Key steps in the synthesis were the conversion of 7-(triethylsilyl)baccatin m to its 13β-chloro-A-nor derivative 6, reaction with sodium

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