theobromine (xantheose) chocolate alkaloid molecule. present in cacao, tea, etc. also used as drug. atoms are represented as

adenosine alkaloid antitussive aphrodisiac asthma atomic atoms bond bronchi cacao carbon chemical chemistry chocolate composition compound cyclic diuretic formula guarana hydrogen ilex kola mate model molecular molecule nitrogen nucleotide oxygen phosphodiesterase purine receptor structure tea theobroma theobromin theobromine vasodilator xantheose xanthine yerba