109438-26-8 4-04-00-03542 (Beilstein Handbook Reference) BRN 1801308 Dwuetylo-tiopirofosfonian dwuamylowy [Polish] Ethylphosphonothioic acid anhydride with ethylphosphonic acid dipentyl ester Phosphonothioic acid, ethyl-, anhydride with ethylphosphonic acid, dipentyl ester