E 1546 (OTTO) Ethylene urea, 96% Cas 120-93-4 - used as Chiral microporous materials from achiral precursors. E 1546 (OTTO) Ethylene urea, 96% Cas 120-93-4 - used as Aryl and heteroaryl N-acylureas via microwave-assisted palladium-catalyzed carbonylation. E 1546 (OTTO) Ethylene urea, 96% Cas 120-93-4 - used as a highly water-soluble peptide based human neutrophil elastase inhibitor.