Sinapinic acid
Sinapinic acid, or sinapic acid is an organic compound with the formula.
It is naturally occurring hydroxycinnamic acid. It is a member of the phenylpropanoid family, which includes many natural products.
Natural occurrences
Sinapic acid is found widely in plants including those used for human nutrition. Some common sinapic acid conjugates include esters with malate and choline. For example, it can be found in wine, vinegar, and black plums. Sinapine is found in black mustard seeds. It is considered a choline ester of sinapinic acid.Sinapic acid has attracted much interest as an antioxidant
Sinapic acid can form dimers with itself and ferulic acid in cereal cell walls and therefore may have a similar influence on cell-wall structure to that of the diferulic acids.
Metabolism
is an enzyme that uses UDP-glucose and sinapate to produce UDP and 1-sinapoyl-D-glucose.Sinapoylglucose—malate O-sinapoyltransferase is an enzyme that uses 1-O-sinapoyl-beta-D-glucose and -malate to produce D-glucose and sinapoyl--malate.