The present invention relates to a marine
fungus fermented extract and its application as an anti-
senile dementia drug. The extract is prepared by the following steps: (1) under sterile conditions, the marine
fungus Alternaria sp.W‑1 is inoculated into PD In the
liquid medium, vibrate culture on a constant temperature
shaker, the temperature is 25-30°C, the speed of the
shaker is 150-180r / min, and the culture time is 2-4d to obtain a seed solution; (2) the seeds obtained in step (1) The solution is inoculated into the Cha's medium, the pH of the medium is 4.0-8.0, the inoculum size is 5-20%, the culture temperature is 22-34°C, and the culture time is 6-14d to obtain a fermented product; (3) the step ( 2) The fermented product obtained is filtered with 3-5
layers of sterile gauze to obtain the filtrate, which is concentrated by a
rotary evaporator, extracted 2-4 times with
ethyl acetate, combined with the organic phases, concentrated by a
rotary evaporator to obtain the extracted thing.