(E)-3,3,6,6-Tetramethyl-9-(2-nitrostyryl)-3,4,5,6,7,9-hexahydro-1H- xanthene-1,8(2H)-dione

Abstract

In the title compound, C25H27NO5, each of the cyclohexenone rings adopts a half-chair conformation, whereas the six-membered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms. In the crystal, weak C - H？O hydrogen bonds link molecules into chains parallel to the c axis.