((Chloro-2 ethyl)-3 nitroso-3 ureido)-1' tri-O-p-nitrobenzoyl-2',3',4' beta-D-ribopyrannose 65222-25-5 BRN 1418161 N-(2-Chloroethyl)-N-nitroso-N'-(2,3,4-tri-O-(4-nitrobenzoyl)-beta-D-ribopyranosyl)urea Urea, N-(2-chloroethyl)-N-nitroso-N'-(2,3,4-tri-O-(4-nitrobenzoyl)-beta-D-ribopyranosyl)-