The crystal structure determination of one of the substituted alpha -chrome
ne components isolated in the hexane extraction of the fruit of the indigen
ous Australian tree Melicope ellyrana, the methyl ether of the known compou
nd alloevodionol, is reported. In this compound, 1-(5,7-dimethoxy-2,2-dimet
hyl-2H-1-benzopyran-8-yl)ethanone, C15H18O4, the methoxy groups are approxi
mately coplanar with the aromatic ring, while the acetyl group is normal to
the ring.