The molecule is a methanesulfonate (mesylate) salt prepared from equimolar amounts of (R)-tetrindole and methanesulfonic acid. It contains a (R)-tetrindole(1+). It is an enantiomer of a (S)-tetrindole mesylate.
(5R)-12-cyclohexyl-1,4-diazatetracyclo[7.6.1.05,16.010,15]hexadeca-9(16),10(15),11,13-tetraene;methanesulfonic acid