Welcome to LookChem.com Sign In|Join Free


  • or


Post Buying Request

51876-19-8 Suppliers

Recommended suppliersmore

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

51876-19-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51876-19-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,8,7 and 6 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 51876-19:
138 % 10 = 8
So 51876-19-8 is a valid CAS Registry Number.

51876-19-8Relevant articles and documents

Flavonoids from Stachys annua Growing in Azerbaijan


, p. 261 - 262 (2018/04/16)

The new acylated flavonoid bioside 4′-O-methylisoscutellarein-7-O-[4-O-acetyl]allopyranosyl-(1→2)-glucopyranoside (1) was isolated from the aerial parts of Stachys annua L. (Lamiaceae). Subterranean organs yielded for the first time 4′-O-methylisoscutella

Biologically Active Compounds from Chamaenerion angustifolium and Stachys annua Growing in Azerbaidzhan

Movsumov,Yusifova, D. Yu.,Suleimanov,Mahiou-Leddet,Herbette,Baghdikian,Garayev,Ollivier,Garayev

, p. 324 - 325 (2016/07/06)


Studies of the Selective O-Alkylation and Dealkylation of Flavonoids. VI. Demethylation of 8-Hydroxy-5,7-dimethoxyflavones with Anhydrous Aluminum Chloride or Bromide in Acetonitrile

Horie, Tokunaru,Kourai, Hiroki,Fujita, Nobuhisa

, p. 3773 - 3780 (2007/10/02)

The demethylation of seven 8-hydroxy-5,7-dimethoxyflavones with anhydrous aluminum chloride or bromide in acetonitrile was studied and the following results were obtained. (1) Anhydrous aluminum chloride in acetonitrile selectively split the 5-methoxyl group without cleavage of the 7-methoxyl group, and seven 5,8-dihydroxy-7-methoxy-flavones were quantitatively synthesized by the demethylation. (2) In the demethylation with anhydrous aluminum bromide, the 5- and 7-methoxyl groups on 4',5,7-trimethoxy- and 3',4',5,7-tetramethoxy-8-hydroxyflavone were selectively split to give the corresponding 5,7,8-trihydroxyflavones in good yield.However, the demethylation was not accessible to the synthesis of 5,7,8-trihydroxy-3',4',5'-trimethoxyflavone, 4',5,7,8-tetrahydroxy-3'-methoxy-, and 3',5,7,8-tetrahydroxy-4'-methoxyflavone, because of the cleavage of the methoxyl groups on the B ring.The synthesized flavones were employed for the identification of the two natural flavones, which were proposed to be 4',5,8-trihydroxy-7-methoxyflavone and 4',5,8-trihydroxy-3',7-dimethoxyflavone.The former, salvitin, was revised to 4',5,7-trihydroxy-6-methoxyflavone and the latter seemed to be 4',5,7-trihydroxy-3',8-dimethoxyflavone.

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)


What can I do for you?
Get Best Price

Get Best Price for 51876-19-8