<unk>  or 2,5-dimethoxy-4-chloroamphetamine  or<unk><unk> -2,5-DMA or DOC is a psychedelic hallucinogenic drug of the phenethylamine family.  Used by some as an entheogen, DOC was presumably first synthesized by Alexander Shulgin.  The drug is generally taken orally, but some users have been known to insufflate or smoke the pure powder.
4-Chloro-2,5-dimethoxyamphetamine
2,5-Dimethoxy-4-methylamphetamine
3,4-Methylenedioxyamphetamine
Amphetamine
Benzidine
Nicotinyl alcohol
Methamphetamine
N-Nitrosonornicotine