1224-64-2 4-06-00-01318 (Beilstein Handbook Reference) BRN 2509364 Dibutyl-phosphinic acid, 4-nitrophenyl ester (9CI) Nibufin Nibuphin Phosphinic acid, dibutyl-, p-nitrophenyl ester Tarin p-Nitropenylester kyseliny dibutylfosfinove [Czech] p-Nitrophenyldi-n-butylphosphinate p-Nitrophenyldibutylphosphinate