27802-03-5COC(=O)C1=CN2CCc3c([nH]c4ccccc34)[C@]2(C)[C@H]2CN3CCc4c([nH]c5ccccc45)[C@H]3C[C@H]12SHKMVIVFLHPOSB-QDWJFAQSSA-N27802-03-5BeschreibungThis alkaloid also occurs in the leaves of Uncaria gambier and forms colourless crystals from MeOH. It is, unlike the remaining alkaloids, dextrorotatory with [α]20D + 160° (MeOH) but the ultraviolet spectrum in EtOH is almost identical with those of the preceding bases, having absorption maxima at 226 and 292 ITIJ1 with a shoulder at 287 mfl. On catalytic hydrogenation it gives the dihydro derivative, m.p. 225-230°C.
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