3-Thiophenecarboxylic acid, 2-amino-5-ethyl-, ethyl ester (8CI 9CI) 4507-13-5 A 8544527G1 Carzinostatin Ethyl 2-amino-5-ethyl-3-thiophenecarboxylate NEOCARZINOSTATIN NSC157365 Neocarzinostatin, crystalline antibiotic ZINOSTATIN