3d image of gentisic acid skeletal formula

gentisic acid dihydroxybenzoic dhb 5-hydroxysalicylic gentianic carboxyhydroquinone dioxybenzoic hydroquinonecarboxylic aspirin kidney alchornea cordifolia tree kolbe–schmitt reaction antioxidant excipient pharmaceutical matrix-assisted laser desorption ionization mass spectrometry maldi sample matrix laboratory metabolite metabolic break 3d prodrug substance matter material compound component agent stuff reagent functional group precursor synthesis production building block atom molecule molecular structural structure formula skeletal geometry ball stick