Compounds containing in the structure a quinoline or isoquinoline ringsystem (whether or not hydrogenated), not further fused
Levorphanol "inn" and its salts
Heterocyclic compounds with nitrogen heteroatom[s] only, containing in the structure a quinoline or isoquinoline ringsystem, whether or not hydrogenated, but not further fused (excl. levorphanol "inn" and its salts, and inorganic or organic compounds of mercury)