2H-1-BENZOPYRAN-6-CARBOXYLIC ACID, 3-GLYOXYLOYL-2-OXO- 3-Glyoxyloyl-2-oxo-2H-1-benzopyran-6-carboxylic acid 3-Glyoxyloyl-6-carboxycoumarin 5-18-08-00686 (Beilstein Handbook Reference) 6468-77-5 BRN 1380585 SC-346