Assertion: crude vanillin | /r/MadeOf | syringaldehyde
Facets:
value: structurally
type: MANNER
Source sentences:
text: The remainder vanillin is produced from lignin via an alkaline oxidation process consisting in treating an alkaline aqueous solution of lignin with oxidants, at high temperature and pressure, to depolymerize the lignin and obtain crude vanillin containing structurally similar compounds like acetovanillone and syringaldehyde difficult to separate.9