The invention discloses a total unsaturated
toad lactone, and a preparation method and a use thereof. The preparation method for the total unsaturated
toad lactone comprises the following steps: (1), crushing the
toad, ultrasonically extracting the crushed toad 3-4 times using
ethanol solution, and filtering to remove the dredges to obtain the toad extracting solution; (2), concentrating the toad extracting solution under reduced pressure to obtain pulp as the toad total extract; (3), suspending the toad total extract with water, extracting the suspended toad total extract using
dichloromethane, and evaporating under reduced pressure to remove
dichloromethane to obtain the
dichloromethane part; and (4), dissolving the dichloromethane part with a
solvent A and regulating the pH value of the solution to 1-6, stirring and reacting the solution for 1-8 hours at a temperature of 0 DEG C to 100 DEG C, adding water to stop the reaction when at least two compounds of Bu-1, Bu-2, Bu-3, Bu-4 and Bu-5 in the solution are detected, extracting using a
solvent B, and evaporating under reduced pressure to remove the
solvent B to obtain the total unsaturated toad
lactone. The total unsaturated toad lactone disclosed by the invention has the activity of inhibiting male sex
hormone dependent form
prostate cancer cell multiplication and non-male sex
hormone dependent form
prostate cancer cell multiplication, and can be used for preparing the
medicine for preventing and treating the
prostate cancer.