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US 4,061,739 AGranted
Isolation of utero-evacuant substances from plant extracts
AssigneeOrtho Pharmaceutical Corporation
InventorsRamesh M. Kanojia, Seymour D. Levine
Life of this patent
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Abstract
A method of obtaining utero-evacuant substances from the zoapatle plant is described. The method involves the isolation and purification of biologically active compounds from the zoapatle plant by chromatography over alumina.
Claims6
The method of purifying extracts containing utero-evacuant materials obtained from the zoapatle plant which comprises the steps of:
- dissolving the mixture of semi-purified utero-evacuant materials in a water-immiscible organic solvent, chromatographing the resultant solution on alumina, eluting the alumina with a mixture of polar and non-polar organic solvents and collecting the fractions containing utero-evacuant materials.
Dependencies are inferred from the claim text.