1 31R 3-(7-hydroxy-2-oxo-4-phenyl-2h-chromen-6-yl)propanoic acid 1.000 2 KOM 7,8-dihydroxy-4-phenyl-2h-chromen-2-one 0.750 3 UWU 6-chloranyl-7-oxidanyl-4-phenyl-chromen-2-one 0.750 4 WZR (4~{R})-7-oxidanyl-4-phenyl-3,4-dihydro-1~{H}-quinolin-2-one 0.708