dacuronium bromide dacuronium bromide dacuronium bromide (inn, ban) (developmental code name nb-68) is an aminosteroid neuromuscular blocking agent which was never marketed. it acts as a competitive antagonist of the nicotinic acetylcholine receptor (nachr). dacuronium bromideclinical dataother namesnb-68; 17β-hydroxypancuronium bromide; 3α-(acetyloxy)-17β-hydroxy-2β,16β-bis(1-methylpiperidinium-1-yl)-5α-androstane dibromide; 2β,16β-dipiperidino-5α-androstane-3α,17β-diol 3α-acetate dimethobromideidentifiers iupac name phenanthren-3-yl] acetate;dibromide cas number27115-86-2pubchem cid14029396chemspider16736917unii33482245b6chemblchembl3138544comptox dashboard (epa)dtxsid60949880 echa infocard100.043.834 chemical and physical dataformulac33h58br2n2o3molar mass690.646 g·mol−13d model (jsmol)interactive image smiles cc(=o)o1c2cc3(2(c14(ccccc4)c)c)cc5(3c(5o)6(ccccc6)c)c.. inchi inchi=1s/c33h58n2o3.2brh/c1-23(36)38-30-20-24-12-13-25-26(33(24,3)22-29(30)35(5)18-10-7-11-19-35)14-15-32(2)27(25)21-28(31(32)37)34(4)16-8-6-9-17-34;;/h24-31,37h,6-22h2,1-5h3;2*1h/q+2;;/p-2/t24-,25+,26-,27-,28-,29-,30-,31-,32-,33-;;/m0../s1key:sukulmjpmhywkc-gmmlhhoxsa-l