116608-93-6 146662-01-3 19232-39-4 20412-62-8 36678-12-3 49561-15-1 51536-34-6 57462-23-4 60099-85-6 60470-34-0 72262-68-1 Butanoic acid, 3-oxo-, ethyl ester, ion(1-), sodium EINECS 242-900-8 Sodium 2-ethoxycarbonyl-1-methylvinyl oxide