4-Formylbenzene-1,2-diol3,4-Dihydroxybenzaldehyde4-FormylcatecholRancinamycin IVProtocatechualdehyde3,4-二羟基苯甲醛3,4-Dihydroxybenzaldehyde原儿茶醛Protocatechuic aldehyde3,4-Dihydroxybenzaldehyde3,4-Dihydroxybenzyl aldehydePROTOCATECHUALDEHYDE3,4-DihydroxybenzenecarbonalNC 0334-Formyl-1,2-benzenediol1,2-Dihydroxy-4-formylbenzeneNSC 229614-Formyl-1,2-dihydroxybenzene3,4-Dihydroxy benzaldehyde4-formyl-1,2-benzenediol3,4-dihydroxybenzaldehydeprotocatechuic aldehyde3,4-dihydroxybenzaldehyde1,2-dihydroxy-4-formylbenzene3,4-dihydroxybenzenecarbonalprotocatechualdehyde4-formyl-1,2-dihydroxybenzeneProtocatechualdehyde
Irritant (Xi)