7-(3,5,6-trimethy1-1,4-benzoquinon-2-y1)-7-phenylheptanoic acid

(+-)-7-(3,5,6-trimethyl-1,4-benzoquinon-2-yl)-7-phenylheptanoicacid

5-(2,4,5-trimethyl-3,6,-dioxo-1,4-cyclohexadien-1-yl)benzeneheptanoic acid

beta-(2,4,5-trimethyl-3,6-dioxo-1,4-cyclohexadien-1-yl)-bezeneheptanoicaci