matairesinol

Aglycone structure

Use the dibenzylbutyrolactone structure as the identity anchor; separately record any glycosylation or other covalent modification. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Matairesinol)

1. What structure evidence establishes matairesinol rather than a related lignan? definition
2. Does the reported material contain free matairesinol, a glycoside or a mixture? boundary

Identifier stereochemical scope

CID 119205 provides a reference for (-)-matairesinol, but the registry's intended stereochemical breadth requires explicit resolution. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Matairesinol)

1. Does vr.tr.matairesinol denote the (3R,4R) form specifically or a stereochemically broader concept? boundary
2. Which verified CAS, PubChem and EC records refer to exactly that scope? provenance

Orthogonal identity evidence

Record reference-standard comparisons and complementary structural evidence; a mass match alone does not settle stereochemistry or exclude isomers.

1. Which NMR, mass-spectral and chromatographic observations support the assignment? measurement
2. What chiral analysis or appropriately conditioned optical-rotation measurement supports the stereochemical assignment? measurement

Quantitative basis

Express content with calibration, sample basis, recovery and uncertainty, including whether hydrolysis preceded measurement.

1. Is the reported value a calibrated mass fraction, concentration or detector-area percentage? measurement
2. How are related lignans, glycosides, residual solvent and water accounted for in the assay? measurement

Conditioned property records

Record measured thermal behavior and solvent-dependent solubility without supplying unsupported reference values.

1. What melting or decomposition behavior was measured, and for which purity and solid form? measurement
2. At the proposed solvent composition, temperature and concentration, is matairesinol fully dissolved? measurement

Stability-qualified use

Base storage and reuse decisions on supplier instructions or measured change in matairesinol content and impurity profile.

1. What evidence supports the storage temperature, light protection and solution holding time? provenance
2. What assay loss, new peaks or precipitation would require reanalysis or replacement? action

Origin versus preparation

Distinguish matairesinol detected before sample treatment from matairesinol obtained after extraction, hydrolysis or another conversion.

1. Which lot, synthesis record or authenticated biological specimen supplied this material? provenance
2. Was matairesinol present as the free compound before processing, or measured only after a conversion step? boundary

Enterolactone relationship

Primary research investigates matairesinol metabolism by human fecal microflora as an enterolignan precursor; conversion observations belong to their experimental conditions. [Primary study](https://pubs.acs.org/doi/10.1021/jf010038a)

1. Which microbial preparation, incubation conditions and analytical evidence establish the observed products? provenance
2. What conversion fraction and time course were measured, and do they apply to the proposed use context? measurement

Application-specific acceptance

Define acceptance criteria for matairesinol content, stereochemical composition, solvent and contaminants according to the experiment.

1. What assay traceability and uncertainty are required before this lot can serve as a quantitative reference? action
2. Could related lignans, solvent effects or conversion products account for the biological signal attributed to matairesinol? boundary

Material-specific handling

Associate hazard classifications and handling requirements with the identified substance or supplied preparation, jurisdiction and document date.

1. Which current supplier SDS and jurisdictional records apply to this exact material, and what remains unclassified or unknown? provenance
2. What containment, protective equipment and disposal route do those records specify for the intended amount and physical form? action

Check these first

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these check these first hold for the sense of matairesinol this model covers, and on what evidence? provenance

Identifiers and schemes

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these identifiers and schemes hold for the sense of matairesinol this model covers, and on what evidence? provenance

Real-world use

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these real-world use hold for the sense of matairesinol this model covers, and on what evidence? provenance

Typical measurements

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these typical measurements hold for the sense of matairesinol this model covers, and on what evidence? provenance

Failure modes and hazards

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these failure modes and hazards hold for the sense of matairesinol this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of matairesinol this model covers, and on what evidence? provenance