TROPOLONE2-Hydroxy-2,4,6-cycloheptatrienonePurpurocatechol2-Hydroxytropone环庚三烯酚酮2-羟基-2,4,6-环庚三烯-1-酮2-Hydroxy-2,4,6-cycloheptatrien-1-oneTropolone品托酮2-hydroxycyclohepta-2,4,6-trien-1-one2-hydroxytroponepurpurocatecholtropolone2-hydroxycyclohepta-2,4,6-trienone2-hydroxy-2,4,6-cycloheptatrien-1-one