Synonyms: | 1h,5h,11h-[1]benzopyrano[6,7,8-ij]quinolizine-10-carbonitrile,2,3,6,7-tetrahyd;ro-11-oxo-;COUMARIN 523;COUMARIN 337;COUMARIN 337, 99%, LASER GRADE, PURE;Coumarin 337, laser grade, pure;3-Cyano-6,7,8-(4-azaheptane-1,4,7-triyl)-2H-1-benzopyran-2-one;Coumarin 337,99%,pure,laser grade |