Norbuprenorphine

(5α,6β,14β,18R)-18-[(1S)-1-hydroxy-1,2,2-trimethylpropyl]-6-methoxy-18,19-dihydro-4,5-epoxy-6,14-ethenomorphinan-3-ol

C[C@]([C@H]1C[C@@]23CC[C@@]1([C@H]4[C@@]25CCN[C@@H]3Cc6c5c(c(cc6)O)O4)OC)(C(C)(C)C)O

InChI=1S/C25H35NO4/c1-21(2,3)22(4,28)16-13-23-8-9-25(16,29-5)20-24(23)10-11-26-17(23)12-14-6-7-15(27)19(30-20)18(14)24/h6-7,16-17,20,26-28H,8-13H2,1-5H3/t16-,17-,20-,22+,23-,24+,25-/m1/s1

Key:YOYLLRBMGQRFTN-IOMBULRVSA-N