Patent ID: 7635778

Claim:
A composition comprising a compound selected from the group consisting of 3-ethylcarbonate-2-(4-(3-ethylcarbonate-4-oxo-4H-chromen-2-yl)phenyl)-4H-chromen-4-one, 3-phenylcarbonate-2-(4-(3-phenylcarbonate-4-oxo-4H-chromen-2-yl)phenyl)-4H-chromen-4-one, 3 tertbutylcarbonate-2-(4-(3-tertbutylcarbonate-4-oxo-4H-chromen-2-yl)phenyl)-4H-chromen-4-one; 3-tertbutylcarbonate-2-phenyl-4H-chromen-4-one; 3-tertbutylcarbonate-2-biphenyl-4H-chromen-4-one; 2-(benzofuran-2-yl)-3-tertbutylcarbonate-4H-chromen-4-one, and bis(4-oxo-2-phenyl-4H-chromen-3-yl) terephthalate.