Keywords: (Z)-but-2-enoic acid 200.svg validSVG Structure of Z -but-2-enoic acid Own 2014-05-25 Emeldir <span class signature-talk ></span> Chemical structure verified https //upload wikimedia org/wikipedia/commons/5/59/ 28Z 29-but-2-enoic_acid_200 svg 1S/C4H6O2/c1-2-3-4 5 6/h2-3H 1H3 H 5 6 /b3-2- LDHQCZJRKDOVOX-IHWYPQMZSA-N 503-64-0 PD-chem Alkene derivatives Carboxylic acids |