1,2,3,4,6-pentakis-O-galloyl-beta-D-glucose is a galloyl-beta-D-glucose compound having five galloyl groups in the 1-, 2-, 3-, 4- and 6-positions. It has a role as a geroprotector, an antineoplastic agent, a radical scavenger, a hepatoprotective agent, a radiation protective agent, an anti-inflammatory agent and a plant metabolite. It is a galloyl beta-D-glucose and a gallate ester. It is a conjugate acid of a 1,2,3,4,6-pentakis-O-galloyl-beta-D-glucose(1-).