In a recent communication we described the structures (1) of two indole alkaloids from Anthocephalus cadamba leaves and speculated that they might be formed from unknown 3β analogues of the glycoalkaloid isodihydrocadambine (2a), previously found in the heartwood. We now report the isolation as their acetate derivatives of two new 3β glycoalkaloids - one corresponding to a presumed precursor - 3β-isodihydrocadambine (2b), and the other to 3β-dihydrocadambine (3b). From UV, IR, NMR and mass spectra both structures had common indole and methyl β-alkoxyacrylate chromophores and a hexoside tetra-acetate moiety, but they differed particularly in their mass spectral fragmentation patterns. Reduction of cadambine with NaBH4 in acetic acid provided 3β-dihydrocadambine and direct comparison of its penta-acetate established identity with the acetylated natural product. The mass spectrum of the second base was virtually identical to that of 3α-isodihydrocadambine penta-acetate, and CD spectrum showed H-3 was β, confirming the new alkaloid is the 3β epimer with the same stereochemistry at C-19 as 3α-isodihydrocadambine.