The
neutral residue was subjected to column chromatography over
alumina (6.5 × 15 cm), eluting with EtOAc (100%) and
EtOAc-MeOH (90:10), to afford 57 fractions of 300 mL each.
Fractions 1-28, eluted with EtOAc (100%), were combined to
obtain three alkaloidal residues that were individually subjected
to further alumina column chromatography to yield
olividine (2, 1.6 mg) from fractions 1-5; olivimine (1, 12 mg)
from fractions 6-10, and consolidine (60 mg), delphatine (7
mg), delsoline (10 mg), and pubescenine (5 mg) from fractions
11-28
Theneutral residue was subjected to column chromatography overalumina (6.5 × 15 cm), eluting with EtOAc (100%) andEtOAc-MeOH (90:10), to afford 57 fractions of 300 mL each.Fractions 1-28, eluted with EtOAc (100%), were combined toobtain three alkaloidal residues that were individually subjectedto further alumina column chromatography to yieldolividine (2, 1.6 mg) from fractions 1-5; olivimine (1, 12 mg)from fractions 6-10, and consolidine (60 mg), delphatine (7mg), delsoline (10 mg), and pubescenine (5 mg) from fractions11-28
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