https://www.thevespiary.org/rhodium/Rhodium/chemistry/cocaine.analog.arecoline.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/cocaine.analog.arecoline.html)
http://l2.espacenet.com/espacenet/bnsviewer?CY=gb&LG=en&DB=EPD&PN=US6472422&ID=US+++6472422B2+I+ (http://l2.espacenet.com/espacenet/bnsviewer?CY=gb&LG=en&DB=EPD&PN=US6472422&ID=US+++6472422B2+I+)
Patent US6472422 (http://l2.espacenet.com/dips/viewer?PN=US6472422&CY=gb&LG=en&DB=EPD)