In an examination of the alkaloids of Vallesia dichotoma there was isolated reserpine, aspidospermine, vallesin, and a new alkaloid (C21-22-H24-26N2O4) now named dichotamine. Analytical data and spectral evidence suggest that the latter compound contains the same methoxylated N-acetyldihydroindole nucleus (I) as is present in aspidospermine. © 1959, American Chemical Society. All rights reserved.