Fifteen alkaloids were characterized from the leaves of Erythroxylum hypericifolium; the majority are esters of cinnamic and benzoic acids. 3α-Cinnamoyloxytropan-6β-ol is the main base. New alkaloids reported are 3β- cinnamoyloxytropane, 3α, 6β-dicinnamoyloxytropane, 3-cinnamoyloxynortropan-6-ol, 6β-acetoxy-3α-cinnamoyl- oxytropane and, tentatively, 6-phenylacetoxytropan-3-ol. Two mixed cinnamate dimers were also found. Some syntheses are reported and the chemotaxonomic implications of the results are discussed. © 1983.