▁ ▁Nic ot in ic ▁ag on ist ▁which ▁stim ul ates ▁the ▁release ▁of ▁dop am ine . ▁ ▁Nap h thy rid ines ▁▁ ▁Am f onel ic ▁acid ▁ ▁Being ▁a ▁car box y lic ▁acid , ▁am f onel ic ▁acid ▁could ▁potentially ▁be ▁used ▁as ▁a ▁car box yl ate ▁for ▁the ▁pro ton ation ▁to ▁the ▁free ▁base ▁of ▁another ▁comp ound ; ▁even ▁conce iv ably ▁creating ▁a ▁' c oca ine ▁am f onel ate ' ▁or ▁' c oca ine ▁A FA ' ▁as ▁opposed ▁to ▁c oca ine ▁H Cl , ▁c oca ine ▁cit rate ▁or ▁c oca ine ▁H Br ▁et ▁c eter a ▁where in ▁such ▁a ▁case ▁it ' s ▁conjug ate ▁used ▁to ▁form ▁it ▁as ▁a ▁salt ▁would ▁addition ally ▁be ▁dop am iner g ic . ▁ ▁Qu in az olin am ines ▁( Al loster ic ▁functional ▁DAT ▁re upt ake ▁in hib itors ) ▁ ▁So RI - 2 0 0 4 1 ▁ ▁So RI - 9 8 0 4 ▁ ▁c f . ▁the ▁ben zt rop ine ▁ph eny lt rop anes : ▁ ▁So RI - 2 0 0 4 1 ▁is ▁a ▁functional , ▁but ▁not ▁struct ural , ▁c oca ine ▁analog ▁which ▁viol ates ▁traditional ▁structure ▁analog ▁categor ization ▁in ▁its ▁case ▁that ▁it ▁has ▁an ▁entirely ▁other ▁binding ▁site . ▁It ▁is ▁however ▁an ▁analog ▁to ▁c oca ine ▁in ▁the ▁sense ▁that ▁it ▁functions ▁as