(3aR)-6,7-dimethoxy-4c-(3,4-dimethoxy-phenyl)-(3ar,9at)-3a,4,9,9a-tetrahydro-3H-naphtho[2,3-c]furan-1-one

二羟基富马酸

原儿茶酸

3,3-bis-(ethyl-phenyl-sulfamoyl)-2-oxo-propionic acid ethyl ester

2,5-bis-diazo-3,4-dioxo-hexanedioic acid dimethyl ester