Two novel flavanones from Greigia sphacelata

As part of our continuing phytochemical investigations of plants from arid environments in Chile, the aerial parts of Greigia sphacelata were examined. Two novel flavanones, 5,7,3'-trihydroxy-6,4',5'-trimethoxyflavanone (1) and 5,3'-dihydroxy-6,7,4',5'-tetramethoxyflavanone (2), as well as eight known compounds-1,3-O-di-trans-p-coumaroylglycerol (3), 1-O-trans-p-coumaroylglycerol (4), a mixture of 1-(omega -feruloyldocosanoyl)glycerol (5) and 1-(omega -feruloyltetracosanoyl)glycerol (6), trans-ferulic acid 22-hydroxy-docosanoic acid ester (7), arborinone (8), arborinol (9), and isoarborinol (10)-were isolated.