nalorphine dinicotinate nalorphine dinicotinate nalorphine dinicotinate (trade name nimelan), also known as n-allylnormorphine dinicotinate, dinicotinoylnalorphine, or niconalorphine, is a semisynthetic, mixed opioid agonist-antagonist which is described as a narcotic antagonist but may produce limited analgesia and sedation at higher doses in opioid naive patients (with limited euphoria and dependence liability). it is the 3,6-dinicotinate ester of nalorphine, and is therefore the nalorphine analogue of nicomorphine (which is the 3,6-dinicotinate ester of morphine). nalorphine dinicotinateclinical dataatc codenonelegal statuslegal status in general: ℞ (prescription only) identifiers iupac name (5α,6α)-17-allyl-7,8-didehydro-4,5-epoxymorphinan-3,6-diyl dinicotinate cas number3194-25-0pubchem cid3083791chemspider2340945comptox dashboard (epa)dtxsid30953838 chemical and physical dataformulac31h27n3o5molar mass521.573 g·mol−13d model (jsmol)interactive image smiles o=c(o2\c=c/65n(cc61c4c(o12)c(oc(=o)c3cccnc3)ccc4c5)c\c=c)c7cccnc7 inchi inchi=1s/c31h27n3o5/c1-2-14-34-15-11-31-22-8-10-25(38-30(36)21-6-4-13-33-18-21)28(31)39-27-24(9-7-19(26(27)31)16-23(22)34)37-29(35)20-5-3-12-32-17-20/h2-10,12-13,17-18,22-23,25,28h,1,11,14-16h2/t22-,23+,25-,28-,31-/m0/s1key:bfywwtignjjahf-ltqsxohqsa-n as nalorphine dinicotinate is only regulated at the rx (prescription required) drug, it would be legal to possess with a valid prescription should a patient manage to acquire it.