Recreational drugs: methamphetamine (crystal meth), caffeine, tetrahydrocannabinol (THC), MDMA (ecstasy), nicotine, amphetamine, heroin, morphine, cathine, ephedrine, ketamine, modafinil, LSD, amyl nitrite (popper), cathinone, GHB, mephedrone, mescaline and psilocybin. Atoms represented as conventionally colored circles
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