1856-95-7

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• Basic information

  1. Product Name: fonsecin monomethyl ether
  2. Synonyms: fonsecin monomethyl ether;2,3-Dihydro-2,5-dihydroxy-6,8-dimethoxy-2-methyl-4H-naphtho[2,3-b]pyran-4-one;Fonsecin B
  3. CAS NO:1856-95-7
  4. Molecular Formula: C16H16 O6
  5. Molecular Weight: 0
  6. EINECS: N/A
  7. Product Categories: N/A
  8. Mol File: 1856-95-7.mol
  9. Article Data: 2

• Chemical Properties

  1. Melting Point: N/A
  2. Boiling Point: 555.8°C at 760 mmHg
  3. Flash Point: 209.8°C
  4. Appearance: /
  5. Density: 1.384g/cm³
  6. Vapor Pressure: 3.46E-13mmHg at 25°C
  7. Refractive Index: 1.642
  8. Storage Temp.: N/A
  9. Solubility: N/A
  10. CAS DataBase Reference: fonsecin monomethyl ether(CAS DataBase Reference)
  11. NIST Chemistry Reference: fonsecin monomethyl ether(1856-95-7)
  12. EPA Substance Registry System: fonsecin monomethyl ether(1856-95-7)

• Safety Data

  1. Hazard Codes: N/A
  2. Statements: N/A
  3. Safety Statements: N/A
  4. WGK Germany:
  5. RTECS:
  6. HazardClass: N/A
  7. PackingGroup: N/A
  8. Hazardous Substances Data: 1856-95-7(Hazardous Substances Data)

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• fonsecin monomethyl ether

  Cas No: 1856-95-7

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1856-95-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1856-95-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,5 and 6 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1856-95:
(6*1)+(5*8)+(4*5)+(3*6)+(2*9)+(1*5)=107
107 % 10 = 7
So 1856-95-7 is a valid CAS Registry Number.

InChI:InChI=1/C16H16O6/c1-16(19)7-10(17)14-12(22-16)5-8-4-9(20-2)6-11(21-3)13(8)15(14)18/h4-6,18-19H,7H2,1-3H3

1856-95-7Upstream product

• 4724-10-1 methyl 2-(3,5-dihydroxyphenyl)acetate 
• 28955-31-9 5-(2-methoxy-2-oxoethyl)-1,3-phenylene diacetate 
• 186581-53-3 diazomethane 
• 3748-39-8 fonsecin 

1856-95-7Downstream Products

1856-95-7Relevant articles and documents

13C NMR Spectroscopy of Naphtho-γ-pyrones

Priestap, Horacio A.

, p. 875 - 878 (1986)

The 13C NMR spectra of three naphtho-γ-pyrones produced by Aspergillus fonsecaeus (NRRL 67, O 16-1) viz. 5-hydroxy-6,8-dimethoxy-2-methyl-4H-naphthopyran-4-one (rubrofusarin B), 2,3-dihydro-2,5-dihydroxy-6,8-dimethoxy-2-methyl-4H-naphthopyran-4-one (fonsecin B) and 2,3-dihydro-2,5,8-trihydroxy-6-methoxy-2-methyl-4H-naphthopyran-4-one (fonsecin), have been determined.Assignments of the carbon resonances were carried out from chemical shifts, long-range carbon-hydrogen couplings and hydrogen-deuterium exchange information.Carbon shift assignments previouly reported for fonsecin have been revised.The C-4 and C-5 signals show that the angle of twist of the carbonyl group with the aryl ring system is larger in fonsecin than in fonsecin B, indicating the occurrence of different preferred conformations in the dihydropyrone ring of these compounds.

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