[Isolation Of Anthelmintic Substance On Clonorchis Sinensis From Tuber Of Bletilla Striata].

The present work was done to isolate the anthelmintic substance from the tuber of Bletilla striata which grows Gangweon-do of the Korea peninsula. The dried B. striata tuber was extracted with ethyl ether by a Soxhlet extractor at 40 degrees C for 24 hours, and then the extract was separated into insoluble material (negative wormicidal) and soluble material (positive wormicidal) by petroleum ether solvent.