Welcome to LookChem.com Sign In|Join Free

CAS

  • or

1239-33-4

Post Buying Request

1239-33-4 Suppliers

Recommended suppliersmore

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

1239-33-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1239-33-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,2,3 and 9 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1239-33:
(6*1)+(5*2)+(4*3)+(3*9)+(2*3)+(1*3)=64
64 % 10 = 4
So 1239-33-4 is a valid CAS Registry Number.

1239-33-4Relevant articles and documents

Synthesis of 14,16-dien-17-yl acetates of androstane series. NMR and mass spectrometry data

Baranovskii,Bolibrukh,Gromak

, p. 1877 - 1885 (2011)

On the basis of dehydroepiandrosterone through the δ14- and δ 15-androst-17-ones a series of androsta-14,16-dienyl acetates was obtained, the key compounds in the synthesis of 14-substituted steroids. By the methods of two-dimensional NMR spectroscopy the structure of compounds was proved and a full assignment of signals in the 1H and 13C NMR spectra was performed. With the use of tandem mass spectrometry the main directions of fragmentation of protonated molecules of the synthesized ketones and dienyl acetates were studied.

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 1239-33-4