exo 1,7-dimethyl-3,5,10-trioxa-tricyclo[5.2.1.0(2,6)]dec-8-en-4-one

(1r,4r)-4-((3-carboxyacrylamido)methyl)cyclohexane-1-carboxylic acid

cis-9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboxylic acid anhydride

2,5-二甲基-1,4-苯二甲酸