p

1-Phenylcyclohexylamine or any compound (not being eticyclidine, ketamine, phencyclidine, rolicyclidine, tenocyclidine or tiletamine) structurally derived from 1-phenylcyclohexylamine or 2-amino-2-phenylcyclohexanone by modification in any of the following ways, that is to say,

i

by substitution at the nitrogen atom to any extent by alkyl, alkenyl or hydroxyalkyl groups, or replacement of the amino group with a 1-piperidyl, 1-pyrrolidyl or 1-azepyl group, whether or not the nitrogen containing ring is further substituted by one or more alkyl groups;

ii

by substitution in the phenyl ring to any extent by amino, alkyl, hydroxy, alkoxy or halide substituents, whether or not further substituted in the phenyl ring to any extent;

iii

by substitution in the cyclohexyl or cyclohexanone ring by one or more alkyl substituents;

iv

by replacement of the phenyl ring with a thienyl ring.