1 HOM 7-hydroxy-4-methyl-3-(2-hydroxy-ethyl)coumarin 1.000 2 4MU 7-hydroxy-4-methyl-2h-chromen-2-one 0.812 3 3QV 7-hydroxy-2-oxo-2h-chromene-3-carbonitrile 0.765 4 XZZ 6-chloro-7-hydroxy-4-methyl-2h-chromen-2-one 0.765 5 07L 7-hydroxy-2h-chromen-2-one 0.750 6 ZZ1 4-methyl-2h-chromen-2-one 0.750 7 G12 3,8-dibromo-7-hydroxy-4-methyl-2h-chromen-2-one 0.722 8 HFC 6,7-bis(oxidanyl)chromen-2-one 0.706 9 MCM 7-amino-4-methyl-chromen-2-one 0.706