(Z)-3,6-di(4-acetoxybenzylidene)piperazine-2,5-dione

2-benzamido-3-(4-hydroxyphenyl)propanoic acid

N-benzoyl-D-tyrosine methyl ester

5-[(4-hydroxyphenyl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one

乙酸酐