Method for extracting and purifying bisbenzylisoquinolines
AssigneeCBA Pharma, Inc.
InventorRon D. Carroll
Life of this patent
Estimating the term…
Abstract
A method for purifying extracted crude d-tetrandrine by dissolving the crude d-tetrandrine powder in ethanol, treating the solution with a decolorizing agent, filtering, reducing the filtered solution under heat and vacuum, cooling the solution, filtering it and drying the filtered cake to yield substantially pure d-tetrandrine.
Claims12
A method for purifying extracted crude d-tetrandrine comprising dissolving the crude d-tetrandrine powder in ethanol, treating the solution with a decolorizing agent, filtering, reducing the filtered solution under heat and vacuum, cooling the solution, filtering it and drying the filtered cake to yield substantially pure d-tetrandrine.
A method for extracting and purifying d-tetrandrine from Stephania Tetrandra comprising extracting bisbenzylisoquinolines from Stephania Tetrandra, separating crude d-tetrandrine from other bisbenzylisoquinolines, and further purifying the crude d-tetrandrine by dissolving it in ethanol, treating it with a decolorizing agent, reducing it under heat and vacuum, cooling, filtering and then drying the filtered cake to yield substantially pure d-tetrandrine.
Dependencies are inferred from the claim text.