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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Nemadectin | CAS 102130-84-7

Nemadectin supplies the complex milbemycin framework used in published moxidectin semisynthesis. Its LL-F28249 alpha identity, congener profile and assay basis should be established before treating a fermentation-derived grade as a qualified starting material.

CAS102130-84-7
Molecular formulaC36H52O8
Molecular weight612.8 g/mol

Product overview

A sixteen-membered lactone, multiple stereogenic centres and an unsaturated C25 side chain define nemadectin within the milbemycin family. Also known as LL-F28249 alpha or S541A, it supplies the complex macrolide framework for published moxidectin semisynthesis. Subsequent modification at C23 produces the methoxime-containing downstream compound. For purchasing, specify whether the requested material is isolated nemadectin or a mixture containing the alpha component. A component-specific quantitative assay and a resolved congener profile help establish the amount available for the receiving transformation. Structural identification should cover the complete macrolide, while the reporting basis should explain the treatment of water and residual solvents when converting analytical results into the required charge.

Chemical identity

Chemical name
Nemadectin
CAS number
102130-84-7
Molecular formula
C36H52O8
Molecular weight
612.8 g/mol

Application context

Nemadectin is the starting macrolide in published moxidectin semisynthesis. The complex milbemycin framework is carried forward, with the later C23 methoxime distinguishing moxidectin from this input. Qualification should identify the LL-F28249 alpha component and separate relevant fermentation congeners. State whether the reported result is area purity, quantitative mass assay or total related macrolides, and how water and residual solvents enter the charging calculation.

Chemistry and synthetic role

The milbemycin lactone and multiple stereochemical centres form the pre-existing architecture carried into the cited semisynthesis. C25 side-chain identity and the distinction between nemadectin and the later C23 methoxime derivative are more informative than the general term macrolide.

Quality review

Define the alpha component

Confirm LL-F28249 alpha / S541A identity and ensure that a mixture or total-milbemycin result is not being offered as a single-component assay.

Resolve relevant congeners

Request chromatographic selectivity for related fermentation components relevant to the proposed grade and receiving route; agree limits after reviewing the actual profile.

Reconcile assay and reporting basis

State whether the result is area percentage or a quantitative assay and how water and residual solvents enter the basis of calculation.

Check structural and stereochemical identity

Review appropriate spectral identity and the treatment of stereochemical integrity for this complex macrolide rather than relying on mass alone.

Preparing a specification

State CAS 102130-84-7, nemadectin / LL-F28249 alpha, intended moxidectin route stage and required physical form. Agree component-selective assay, congener limits, reporting basis and applicable water or solvent criteria.

Packaging and storage

Confirm packaging format, net weight and transport arrangements for the selected grade, order quantity and destination. Request the applicable SDS and label to establish storage and handling conditions.

Documentation

Request the proposed specification, batch COA and current SDS. Confirm availability of the analytical methods and batch evidence relevant to the intended process. Confirm availability of an identified chromatogram, quantitative-assay basis, congener assignments and structural identity evidence for the proposed material.

Procurement questions

Is nemadectin the same compound as moxidectin?

No. Nemadectin is the starting macrolide in the cited semisynthesis; moxidectin contains the downstream C23 methoxime modification.

Does a total milbemycin assay qualify this product?

Not by itself. The enquiry identifies LL-F28249 alpha, so the analytical result must establish that component.

Why distinguish assay from chromatographic area?

Area normalization does not automatically account for response differences, water or residual solvent and is not inherently a mass-based assay.

How are congener limits selected?

Use the proposed batch profile, demonstrated chromatographic separation and the receiving moxidectin process to select the congeners and their acceptance limits.

Technical sources
  1. PubChem CID 6436124: identity properties and CAS synonymsNCBI / PubChem
  2. Nemadectin BIA-N1056 product datasheetBioAustralis, document hosted by Funakoshi
  3. CN104277050A: Method for preparation of moxidectinCNIPA via Google Patents
  4. CN105085540B: Method for preparation of high-content nemadectinCNIPA via Google Patents