4-Formylbenzene-1,2-diol3,4-Dihydroxybenzaldehyde4-FormylcatecholRancinamycin IV3,4-DihydroxybenzaldehydeProtocatechualdehyde3,4-二羟基苯甲醛原儿茶醛Protocatechuic aldehyde3,4-Dihydroxybenzaldehyde3,4-Dihydroxybenzyl aldehydePROTOCATECHUALDEHYDENC 0333,4-Dihydroxybenzenecarbonal1,2-Dihydroxy-4-formylbenzene4-Formyl-1,2-benzenediolNSC 229614-Formyl-1,2-dihydroxybenzene3,4-Dihydroxy benzaldehyde3,4-dihydroxybenzenecarbonal4-formyl-1,2-benzenediolProtocatechualdehyde3,4-dihydroxybenzaldehydeprotocatechuic aldehyde3,4-dihydroxybenzaldehyde4-formyl-1,2-dihydroxybenzene1,2-dihydroxy-4-formylbenzeneprotocatechualdehyde