3d image of pyrogallol skeletal formula

pyrogallol benzenetriol trihydroxybenzene pyrogallic acid isomer gallic acid tannin orsat apparatus hair dyeing gas analysis oxygen absorption antiseptic disinfectant sterilant developing agent black- -white developer photographic pmk variable-contrast papers compensating developer toxicity 510-pyro substance matter material compound component stuff reagent functional group precursor synthesis reaction production building block organic chemical molecule molecular formula skeletal structural structure 3d chemistry science scientific