During the routine analysis of coca leaf material from South America, alkaloids in Erythroxylum coca var. ipadu (ECVI) leaf samples from fields suspected of being treated with glyphosate were compared with those from non-treated E. coca var. ipadu and Erythroxylum novogranatense var. novogranatense (ENVN) plants. Cocaine levels in leaf tissue from non-treated ECVI and ENVN were 0.53+/-0.08% and 0.64+/-0.08% (w/w), respectively, whereas leaves from treated plants were nearly devoid of cocaine. Further analysis demonstrated the presence of several previously undescribed N-nortropane alkaloids, several of which were tentatively identified. The results suggest that applications of glyphosate to coca plants can have dramatic effects on the quantity and quality of alkaloids produced by surviving or subsequent leaves. The analytical data presented will be of value to forensic chemists who encounter illicit cocaine preparations containing alkaloids produced from coca plants treated with glyphosate.
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