Abstract: The present invention provides a fluorescent resveratrone [(E)-4-(6,8-dihydroxynaphthalen-2-yl)but-3-en-2-one] and its derivatives having Formula 1 and a method for preparing the same by a photochemical reaction of resveratrol and its derivatives which are not fluorescent having Formula 7 or Formula 8. The new fluorescent compounds of the present invention has single-photon absorptive characteristics and/or two-photon absorptive characteristics as well as no or little toxicity according to a cytotoxicity test and can be usefully utilized in the field of organic fluorescent element, display element, spectrometer, two-photon absorptive storing device, laser micro processing apparatus, photo dynamic therapy apparatus and the like.

Abstract: The present invention provides a water-soluble fluorescent compound of resveratrone 6-O-?-glucoside [(E)-4-(8-hydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)naphthalen-2-yl)but-3-en-2-one] and its derivatives of Formula 1 which have at least one water-soluble substituent, and a method for preparing the same by a photochemical reaction of resveratrol 3-O-?-glucoside and its derivatives of having Formula 3 which are not fluorescent. Said new water-soluble fluorescent compounds has single-photon absorptive characteristics and/or two-photon absorptive characteristics as well as no or little toxicity, and can be usefully utilized in fields that requires water-soluble fluorescent characteristics (diagnosis, fluorescent probe, in vivo imaging, display, etc.).