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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Pneumocandin B0 | CAS 135575-42-7

A fermentation-derived cyclic lipopeptide used as the starting molecule for semisynthetic caspofungin, where differentiation from closely related pneumocandins and a clear content-reporting basis are central to qualification.

CAS135575-42-7
Molecular formulaC50H80N8O17
Molecular weight1065.2 g/mol

Product overview

Pneumocandin B0 is a fermentation-derived cyclic lipopeptide with a lipid side chain and a highly functionalized hexapeptide framework. Its role in caspofungin semisynthesis makes homologue separation particularly relevant. Confirm the complete natural-product identity and review chromatographic purity separately from the assigned content used to calculate process input.

Chemical identity

Chemical name
Pneumocandin B0
CAS number
135575-42-7
Molecular formula
C50H80N8O17
Molecular weight
1065.2 g/mol

Application context

Pneumocandin B0 is the starting molecule for semisynthetic caspofungin. Its fermentation-derived profile makes separation from Pneumocandin A0 and other related products a practical qualification priority. Evaluate a representative homologue chromatogram together with assigned content, water and relevant process residues, using requirements matched to the caspofungin conversion stage.

Chemistry and synthetic role

An acyl side chain is attached to a cyclic six-residue peptide containing multiple hydroxyl and amide functions. The molecular identity depends on the peptide framework and its stereochemistry, not merely the total formula. Closely related fermentation homologues require discriminating analytical methods.

Quality review

Resolve fermentation homologues

Confirm chromatographic separation of Pneumocandin B0 from A0 and other fermentation-related products relevant to the caspofungin process.

Agree the assigned-content basis

Distinguish peak-area purity from content used to calculate process input, including the treatment of water or residual solvent where applicable.

Match the natural-product identity

Use a confirmed B0 reference structure and suitable identification data; matching mass alone is not sufficient to establish every structural feature.

Specify process-dependent requirements

Assess fermentation and purification residues against the downstream process. Sterility or endotoxin limits should be requested only when the intended use requires them.

Preparing a specification

Specify Pneumocandin B0 by CAS and reference structure, the assay/content basis and a related-substance method capable of separating relevant pneumocandin homologues. State justified water, solvent or process-residue criteria and the intended caspofungin input stage.

Packaging and storage

Agree packaging, net weight and transport arrangements for the selected grade, quantity and destination. Confirm storage and handling conditions using the current SDS for the proposed material.

Documentation

Request the identity package, representative related-substance chromatogram and the basis for assigned content. Confirm availability of batch COA, current SDS and information on the controls relevant to the selected fermentation-derived grade.

Procurement questions

Is Pneumocandin B0 caspofungin acetate?

No. B0 is the documented precursor for semisynthesis; the final drug and its acetate form are different chemical entities.

Why should Pneumocandin A0 be discussed?

A0 and B0 are structurally similar fermentation products. A method that resolves them helps define the homologue profile of the material entering semisynthesis.

Does a high HPLC area establish process content?

Not alone. Agree the reporting basis and account for components not represented by the selected chromatographic measurement.

What should the homologue chromatogram demonstrate?

Separation of Pneumocandin B0 from A0 and other related products relevant to the intended caspofungin process.

Technical sources
  1. PubChem CID 16119739: properties and CAS synonym crosscheckNCBI / PubChem
  2. Pneumocandin B0 — P2534Tokyo Chemical Industry
  3. Engineering of Glarea lozoyensis for exclusive production of the pneumocandin B0 precursor of the antifungal drug caspofungin acetateChen et al.; Applied and Environmental Microbiology / NCBI PubMed
  4. Engineering of Glarea lozoyensis… — full-text indexed passagesAmerican Society for Microbiology / NCBI PMC