Received 1 June 2010
In the title compound, C14H22O4 (systematic name: 9-hydroxy-1,5,5-trimethyl-1,8-epidioxyspiro[5.5]decan-2-one), which was isolated from the fermentation broth of Steccherinum ochraceum, the two six-membered rings adopt chair conformations and are bridged by a peroxide group. The hydroxy H atom forms a three-centre cyclic intermolecular O-H(O,O') hydrogen-bonding interaction with a peroxide and a carbonyl O-atom acceptor, forming  chains.
Data collection: SMART (Bruker, 2001); cell refinement: SAINT-Plus (Bruker, 2003); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ZS2044 ).
This Project was supported by China Postdoctoral Science Foundation (5350209-7-1).
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