See these pages:
http://en.wikipedia.org/wiki/List_of_cocaine_analogues
http://en.wikipedia.org/wiki/User:Nuklear/Nocaine
http://en.wikipedia.org/wiki/CPCA
http://en.wikipedia.org/wiki/Troparil
http://en.wikipedia.org/wiki/WIN_35428
http://en.wikipedia.org/wiki/RTI-31
http://en.wikipedia.org/wiki/RTI-32
http://en.wikipedia.org/wiki/RTI-51
http://en.wikipedia.org/wiki/RTI-55
http://en.wikipedia.org/wiki/RTI-274
These papers:
Keverline-Frantz, K.; Boja, J.; Kuhar, M.; Abraham, P.; Burgess, J.; Lewin, A.; Carroll, F. (1998). "Synthesis and ligand binding of tropane ring analogues of paroxetine". Journal of medicinal chemistry 41 (2): 247–257.
Runyon, SP; Carroll (2006). "Dopamine transporter ligands: recent developments and therapeutic potential". Current topics in medicinal chemistry 6 (17): 1825–43.
Carroll FI, Kotian P, Dehghani A, Gray JL, Kuzemko MA, Parham KA, Abraham P, Lewin AH, Boja JW, Kuhar MJ. Cocaine and 3 beta-(4'-substituted phenyl)tropane-2 beta-carboxylic acid ester and amide analogues. New high-affinity and selective compounds for the dopamine transporter. J Med Chem. 1995 Jan 20;38(2):379-88.
Kimmel, H.; O'Connor, J.; Carroll, F.; Howell, L. (2007). "Faster onset and dopamine transporter selectivity predict stimulant and reinforcing effects of cocaine analogs in squirrel monkeys". Pharmacology, biochemistry, and behavior 86 (1): 45–54.
Balster, RL; Carroll; Graham; Mansbach; Rahman; Philip; Lewin; Showalter (1991). "Potent substituted-3 beta-phenyltropane analogs of cocaine have cocaine-like discriminative stimulus effects". Drug and alcohol dependence 29 (2): 145–51.
Xu, L.; Kelkar, S.; Lomenzo, S.; Izenwasser, S.; Katz, J.; Kline, R.; Trudell, M. (1997). "Synthesis, dopamine transporter affinity, dopamine uptake inhibition, and locomotor stimulant activity of 2-substituted 3 beta-phenyltropane derivatives". Journal of medicinal chemistry 40 (6): 858–863.