Sinapoyl choline

Cinnamic esters are also found as sugar esters, or as esters of a variety of other organic acids. For example, sinapoyl esters represent a class of UV-absorbing compounds in the family of the Brassicaceae. Examples include sinapoyl malate (1.19) present in leaves, and sinapoyl choline (1.20) present in roots (Ruegger and Chappie, 2001). 

Sinapoyl esters are phenolic compounds found in members of the Brassicaceae, which includes the model plant Arabidopsis thaliana. The two major sinapoyl esters are sinapoyl malate (3.92) and sinapoyl choline (3.93), which accumulate in leaves and seeds, respectively. Sinapoylmalate plays a role in the protection against UV-radiation (Landry et al., 1995), whereas sinapoyl choline may be used as a storage form of choline in seeds (Shirley and Chappie, 2003). The precursor of these two esters is sinapate (3.35). 

STRACK, D., KNOGGE, W., DAHLBENDER, B., Enzymatic-Synthesis of Sinapine from 1-0-Sinapoyl-Beta-D- Glucose and Choline by a Cell-Free System from Developing Seeds of Red Radish Raphanus Sativus L. var. Sativus), Z. 

Cis- and trans-sinapine (the choline ester of sinapic acid), sinapic acid, sinapoyl glucose, Kaempferol-sinapoyl-trihexoside 1 -0-P-D-glucopyranosyl sinapate, Sinapoyl-hexoside, Disinapoyl hexoside, trisinapoyl-dihexoside and sinapoyl conjugate... 

In germinating seeds, the choline esters are transformed into the corresponding malates. In young plants 2-O-sinapoyl-L-malic acid predominates (8-94), while the main depsides in older plants are 2-0-(4-coumaroyl)-L-malic acid and 2-O-cafleoyl-L-... 

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