benzophenoxazinone

== English == === Noun === benzophenoxazinone (countable and uncountable, plural benzophenoxazinones) A photosensitizer with chemical formula C16H11NO, used in the production of dyes. 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 […]