4Sasaki M,Ebina C,Okamura H. (Hydroxyphenyl)propionate esters[P].JP,6253942,1987.
5Sasaki M,Ebina C,Okamura H. Method for producing hydroxyphenylpropionic acid ester[P].US,4754045,1988.
6Takee K,Gohbayashi M,Oka K. Process for the production of ester compounds[P].US,5081280,1992.
7Kleiner C,Evans S,Schmitt R. Process for the preparation of hydroxyphenylcarboxylates[P].US,5481023,1996.
8Rheinfelden-Herten,Gabriele Baisch,Binzen. Process for the preparation of phenolic carboxylic acid derivatives by enzymatic catalysis[P].US,7507853B2,2009.
