HomeN-(4-Benzyloxytrityl)-N'-(2-nitrobenzenesulphonyl)-1,4-diaminobutane resinN-(4-Benzyloxytrityl)-N'-(2-nitrobenzenesulphonyl)-1,4-diaminobutane resin 0.9 - 1.1 mmol/g, cross-linked with 1% DVB (200-400 mesh)