The molecule is a polycyclic ether comprising a linear sequence of sequence of four trans-fused oxacycles and one spiro-fused tetrahydrofuran ring. It has a role as a hapten. It is a polycyclic ether and an organic heteropentacyclic compound.
(1R,3S,5S,7S,8R,10R,12S,14R,15S,16S,17R,19S,20S,21S)-7-(hydroxymethyl)-5,15,16,21-tetramethylspiro[2,9,13,18-tetraoxatetracyclo[10.9.0.03,10.014,19]henicosane-17,2'-oxolane]-8,20-diol