Abstract
The title compound, C22H30O7, is a fused five-ring system that is of interest for its anticancer and antimalarial activity. The six-membered C-6 and C5O rings display chair conformations. The six- membered C3O3 ring containing the ether and peroxy functionalities has a distorted boat conformation, with a C-O-O-C torsion angle of 42.6 (1)degrees for the peroxy group. The seven-membered C6O ring has a distorted boat-type conformation, while the seven-membered C5O2 ring has a very distorted chair-type conformation. The structure contains intermolecular O-H center dot center dot center dot O and O-H center dot center dot center dot(O,O) bonds that link the molecules into sheets parallel to the (100) planes.