caffeine. cns stimulant. psychoactive drug. the structural formula of a chemical compound

abstract atom atomic bond c8h10n4o2 caffeine chain chem chemical chemistry clipart coffea coffee compound contour design diagram dietary drug emblem formula graphic icon illustration line logo logotype medication medicine model molecular molecule outline paraxanthine particle psychoactive science shape sign silhouette simple sketch structure substance supplement symbol tea theobromine theophylline vector