The isolation of the indole alkaloids uncarine E (17), C (16), D (21),
glabratine (29) and deoxycordifoline (30) from the fresh bark of Unca
ria glabrata DC. (Rubiaceae) is reported. The high-field H-1 and C-13
n.m.r. spectra of these uncarines as well as uncarine B (14) and mitra
phylline (12) are recorded and interpreted.