5-異苯並呋喃甲酸1,3-二氫-1,3-二氧基-5,5′-[(1-甲基亞乙基)二4,1-苯烯]酯 5-Isobenzofurancarboxylic acid,1,3-dihydro-1,3-dioxo-,5,5′-[(1-methylethylidene)di-4,1-phenylene] ester HPLC: ≥ 99.5%