GAMMA-SPIROKETAL-GAMMA-LACTONES AND PHARMACEUTICAL COMPOSITION CONTAINING SAME AND PROCESS FOR PREPARATION THEREOF

摘要

The present invention relates to γ-spiroketal-γ-lactones of formula (I) or a stereoisomer, ester, hydrate, solvate or pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier, diluent or excipient and a process for preparation thereof. The present invention further provides a pharmaceutical composition comprising γ-spiroketal-γ-lactones of formula (I) or a salt thereof.;