benzophenoxazinone

Noun

 * 1) A photosensitizer with chemical formula C16H11NO, used in the production of dyes.
 * 2) * 1965, Chemical Society (Great Britain), Journal of the Chemical Society (part 1, page 481)
 * A reaction under our preparative conditions with 2,6-xylenol afforded, in very small yield, only one benzophenoxazinone, which was red