(S)-(+)-3,4-dihydro-6-hydroxy-2,5,7,8-tetramethyl-2H-1-benzopyran-2-carboxylic acid methyl ester

6-羟基-2,5,7,8-四甲基色满-2-羧酸

(R)-2-hydroxy-2-methyl-4-(2,4,5-trimethyl-3,6-dioxocyclohexa-1,4-dien-1-yl)butanoic acid

2,5-二甲氧基-3,4,6-三甲基苯甲醛