Welcome to LookChem.com Sign In|Join Free

CAS

  • or

123657-20-5

Post Buying Request

123657-20-5 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

123657-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 123657-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,6,5 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 123657-20:
(8*1)+(7*2)+(6*3)+(5*6)+(4*5)+(3*7)+(2*2)+(1*0)=115
115 % 10 = 5
So 123657-20-5 is a valid CAS Registry Number.

123657-20-5Relevant articles and documents

NEW SYNTHESIS OF OXIME-TYPE BETA-LACTAM ANTIBIOTICS

Mandel, Martin,Novak, Ludvik,Rajsner, Miroslav,Holubek, Jiri,Hola, Vladislava

, p. 1734 - 1745 (2007/10/02)

Reacton of anhydrous acids II with phosphorus pentachloride afforded hydrochlorides of chlorides III which were used in acylations of N,O-bis(trimethylsilyl) derivatives of 6-aminopenicillanic acid and 7-aminodeacetoxycephalosporanic acid.Change of the (Z)-configuration of the alkoxyimino group during the synthesis was observed only in the methoxyimino series.The prepared penicillins IV are effective against gram-positive as well as gram-negative bacteria.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 123657-20-5