Fisetin Description It is a coloring agent; Fisetin is a potent sirtuin activating compound (STAC) Specifications Cas No. 528-48-3 Product ID F3473 Product Name Fisetin Formula Wt. 286.24 Store Temp Ambient References David A. Sinclair et al. Discover Three Classes of Molecules that Activate Sirtuins (Including Resveratrol)