organic cation ammonium ion derivative (S,S)-tramadol (R,R)-tramadol(1+) (S,S)-tramadol(1+) 264.38310 C16H26NO2 (-)-tramadol(1+) chebi_ontology CHEBI:75738 COc1cccc(c1)[C@]1(O)CCCC[C@H]1C[NH+](C)C InChI=1S/C16H25NO2/c1-17(2)12-14-7-4-5-10-16(14,18)13-8-6-9-15(11-13)19-3/h6,8-9,11,14,18H,4-5,7,10,12H2,1-3H3/p+1/t14-,16+/m0/s1 TVYLLZQTGLZFBW-GOEBONIOSA-O An organic cation obtained by protonation of the tertiary amino group of (S,S)-tramadol. [(1S,2S)-2-hydroxy-2-(3-methoxyphenyl)cyclohexyl]-N,N-dimethylmethanaminium +1 264.19581