2-Hydroxynaringenin (2,4',5,7-Tetrahydroxyflavanone) is a flavonoid compound isolated from Paeonia lactiflora in Taiwan.

Neorauflavane shows tyrosinase inhibition, it can inhibit tyrosinase monophenolase activity with an IC50 of 30 nM, it also can efficiently reduce melanin content in B16 melanoma cells with 12.95 uM of IC50.

Flemiphilippin A has antioxidant activity, it shows DPPH radical scavenging activity with effective half maximal concentration (EC50) of 18.36 ug mL. Flemiphilippinin A (5 ug mL) exhibits some level of antitumor activity against human hepatocellular carci

(-)-2-C-Methyl-D-erythrono-1,4-lactone is inactive alone, but elicits oviposition behavior when mixes with other fractions.