The molecule is a polycyclic ether comprising a linear sequence of sequence of five trans-fused oxacycles and one spiro-fused tetrahydrofuran ring. It has a role as a hapten.
(1R,3S,3'S,5R,6S,7S,8R,10S,11S,12S,13R,15S,17R,19R,21S,22R,24S)-21-(hydroxymethyl)-6,7,12,17,21-pentamethylspiro[4,9,14,20,25-pentaoxapentacyclo[13.10.0.03,13.05,10.019,24]pentacosane-8,5'-oxolane]-3',11,22-triol