v. 1. 2C-B (nexus) to benzylpiperazine/trifluoromethyl-phenylpiperazine -- v. 2. Caffeine to diuretics -- v. 3. Ecstasy to LSD (lysergic acid diethylamide) -- v. 4. Marijuana to nitrous oxide -- v. 5. Opium to tranquilizers.
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