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Heterocyclic building blocks

Macromomycin B

Also known as methyl 7-methoxy-2-methylidene-3-oxo-4H-1,4-benzoxazine-5-carboxylate, Macromomycins, Auromomycin

CAS 55945-87-4Formula C12H11NO5Molar mass 249.22 g/mol
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Macromomycin B chemical structure, C12H11NO5, CAS 55945-87-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
55945-87-4
Formula
C12H11NO5
Molar mass
249.22 g/mol
HS code
293499
Category
Heterocyclic building blocks

What is Macromomycin B?

Plain description, key identifiers and synonyms

Macromomycin B is a chemical substance with the molecular formula C12H11NO5 and a molar mass of 249.22 g/mol. Its CAS registry number is 55945-87-4. The IUPAC name is methyl 7-methoxy-2-methylidene-3-oxo-4H-1,4-benzoxazine-5-carboxylate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methyl 7-methoxy-2-methylidene-3-oxo-4H-1,4-benzoxazine-5-carboxylate
CAS number
55945-87-4Other or deprecated CAS: 12634-34-3, 70213-45-5, 85691-10-7
Molecular formula
C12H11NO5
UNII
H4AJ86QK46
InChIKey
HXKWEZFTHHFQMB-UHFFFAOYSA-N
InChI
InChI=1S/C12H11NO5/c1-6-11(14)13-10-8(12(15)17-3)4-7(16-2)5-9(10)18-6/h4-5H,1H2,2-3H3,(H,13,14)
SMILES (canonical and isomeric)
COC1=CC(=C2C(=C1)OC(=C)C(=O)N2)C(=O)OC

Synonyms

  • methyl 7-methoxy-2-methylidene-3-oxo-4H-1,4-benzoxazine-5-carboxylate
  • Macromomycins
  • Auromomycin
  • Macromomycin I
  • Macromomycin I protein
  • Macromomycin
  • 2H-1,4-Benzoxazine-5-carboxylic acid, 3,4-dihydro-7-methoxy-2-methylene-3-oxo-, methyl ester
  • Methyl 3,4-dihydro-7-methoxy-2-methylene-3-oxo-2H-1,4-benzoxazine-5-carboxylate
  • Macromomycin protein
  • Macromycin apoprotein, Streptomyces macromomyceticus
  • Benzenemethanamine,N-(4-methylphenyl)-
  • Methyl 7-methoxy-2-methylidene-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-5-carboxylate

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
249.22 g/molcalc.
Exact mass
249.0637 Dacalc.
LogP (octanol/water)
1.33calc.
Topological polar surface area
73.86 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
2calc.
Heavy atoms
18calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.17calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C=C1Oc2ccccc2NC1=O

C=C1Oc2ccccc2NC1=O

2 rings, 12 atoms.

6 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Macromomycin B suppliers

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Macromomycin B price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Macromomycin B is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Macromomycin B is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Macromomycin B, based on the data on this page

What is Macromomycin B?

Macromomycin B is a chemical substance with the molecular formula C12H11NO5 and a molar mass of 249.22 g/mol. Its CAS registry number is 55945-87-4. The IUPAC name is methyl 7-methoxy-2-methylidene-3-oxo-4H-1,4-benzoxazine-5-carboxylate.

What is the CAS number of Macromomycin B?

The CAS registry number of Macromomycin B is 55945-87-4. Other or deprecated CAS numbers: 12634-34-3, 70213-45-5, 85691-10-7.

What is the molecular formula and weight of Macromomycin B?

The molecular formula of Macromomycin B is C12H11NO5 and its molar mass is 249.22 g/mol.

What is Macromomycin B used for?

Known uses and roles of Macromomycin B include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Macromomycin B hazardous?

No GHS hazard classification for Macromomycin B is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Macromomycin B?

Macromomycin B is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Macromomycin B?

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What is the price of Macromomycin B?

Suppliers quote Macromomycin B on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Macromomycin B

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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