| abstract |
Provided is a novel prophylactic / therapeutic agent effective for lymphedema without conventional effective therapeutic means. A compound represented by the following formula (1) (wherein R 1 represents an organic group, X represents —CH 2 CH 2 — or —CH═CH—, and R 2 represents a hydrogen atom or an alkyl group), a lactone derivative thereof, or Lymphedema prophylaxis or therapeutic agent comprising a salt of |