Nicomorphine (Vilan, Subellan, Gevilan, MorZet) is the 3,6-dinicotinate ester of morphine. It is a strong opioid agonist analgesic two to three times as potent as morphine with a side effect profile similar to that of dihydromorphine, morphine, and diamorphine.
Nicomorphine was first synthesized in 1904 and was patented as Vilan by Lannacher Heilmittel G.m.b.H. of Austria in 1957.