Title: Vellosimine CAS Registry Number: 6874-98-2 CAS Name: Sarpagan-17-al Additional Names: velosimine Molecular Formula: C19H20N2O Molecular Weight: 292.37 Percent Composition: C 78.05%, H 6.89%, N 9.58%, O 5.47% Literature References: From bark of Geissosperum vellosii Allem., Apocynaceae: Rapoport et al., J. Am. Chem. Soc. 80, 1601 (1958). Structure: Rapoport, Moore, J. Org. Chem. 27, 2981 (1962); Ohashi et al., Tetrahedron 19, 2241 (1963). Properties: Crystals from methanol, mp 305-306°. Can be sublimed at 180-100° (0.01 mm). [a]D26 +48°. uv max (ethanol): 280, 289 nm (e 8000, 6430). Melting point: mp 305-306° Optical Rotation: [a]D26 +48° Absorption maximum: uv max (ethanol): 280, 289 nm (e 8000, 6430)

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