1,cis-2,3-Propenetricarboxylic acid 1-Propene-1,2,3-tricarboxylic acid, (Z)- 1-Propene-1,2,3-tricarboxylic acid, cis- 585-84-2 NSC227901 cis-Aconic acid cis-Aconitate cis-Aconitic acid cis-Oxaloacetic acid