Any substance that is an analogue of a drug prescribed in this Schedule, being a substance that has psychotropic properties, is not separately specified in this Schedule and is, in relation to the drug, any of the following
a) a structural isomer having the same constituent groups as the drug,(b) a structural modification obtained in one or more of the following ways
i)
the replacement of up to 2 carbocyclic or heterocyclic ring structures with different carbocyclic or heterocyclic ring structures,(ii) the addition of hydrogen atoms to 1 or more unsaturated bonds,(iii) the addition of 1 or more of the following groups having up to 6 carbon atoms in any alkyl residue, namely, alkoxy, cyclic diether, acyl, acyloxy, monoalkylamino and dialkylamino groups,(iv) the addition of 1 or more of the following groups having up to 6 carbon atoms in the group and being attached to oxygen, namely, alkyl, alkenyl and alkynyl groups (for example, ester groups and ether groups),(v)
the addition of 1 or more of the following groups having up to 6 carbon atoms in the group and being attached to nitrogen, sulphur
or carbon, namely,
alkyl, alkenyl and alkynyl groups,(vi) the addition of 1 or more of the following groups, namely, halogen, hydroxy, nitro and amino groups,(vii) the replacement of 1 or more of the groups specified in subparagraphs (iii)-(vi) with 1 or more other groups so specified,(viii) the conversion of a carboxyl or an ester group into an amide group.