New tropane alkaloids, (+)-(3R,6R)-3α-Acetoxy-6β-hydroxytropane and (+)-2α-Benzoyloxy-3β-hydroxynortropane, from Peripentadenia mearsii (Euphorbiaceae)

New tropane alkaloids, (+)-(3R,6R)-3α-Acetoxy-6β-hydroxytropane and (+)-2α-Benzoyloxy-3β-hydroxynortropane, from Peripentadenia mearsii (Euphorbiaceae) Alkaloids of Peripentadenia mearsii. I. Isolation, Structural Determination, and Synthesis of Peripentadenine Alkaloids with Human δ-Opioid Receptor Binding Affinity from the Australian Rainforest Tree <i>Peripentadenia mearsii</i> Alkaloids with Human δ-Opioid Receptor Binding Affinity from the Australian Rainforest Tree <i>Peripentadenia mearsii</i> Tropane alkaloids from the leaves and stem bark of Erythroxylon alaternifolium and Erythroxylon rotundifolium New Tropane Alkaloids from Erythroxylum moonii Tropane alkaloids from the leaves and stem bark of Erythroxylon alaternifolium and Erythroxylon rotundifolium Alkaloids of peripentadenia mearsii. II Alkaloids of Erythroxylum cuneatum, E. ecarinatum and E. australe Alkaloids of Erythroxylum hypericifolium leaves