alletorphine alletorphine alletorphine (inn; m-218, r&s-218-m), or n-allylnoretorphine, is an opioid analgesic of the oripavine series which was never marketed. alletorphineclinical dataatc codenoneidentifiers iupac name (5α,6β,14β,18r)-18--6-methoxy-17-prop-2-en-1-yl-7,8-didehydro-18,19-dihydro-4,5-epoxy-6,14-ethenomorphinan-3-ol cas number23758-80-7 npubchem cid72090chemspider16736565 yunii4uwr086noachemblchembl2104628 nchemical and physical dataformulac27h35no4molar mass437.580 g·mol−13d model (jsmol)interactive image smiles c(o)(ccc)6c42/c=c/6(oc)3oc5c1c(c4n(cc123)cc=c)ccc5o inchi inchi=1s/c27h35no4/c1-5-9-24(3,30)19-16-25-10-11-27(19,31-4)23-26(25)12-14-28(13-6-2)20(25)15-17-7-8-18(29)22(32-23)21(17)26/h6-8,10-11,19-20,23,29-30h,2,5,9,12-16h2,1,3-4h3/t19-,20-,23-,24+,25-,26+,27-/m1/s1 ykey:osqiruuenntoql-gczkjhqnsa-n y ny (what is this?) (verify)