oxabicyclic

Adjective

 * 1)  Describing a bicyclic compound having a bridging oxygen atom.
 * Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich
 * These oxabicyclic systems are very versatile intermediates in organic synthesis and have been prepared typically in racemic form by the [3 + 4] annulation between allyl cations and furans.