( O6 ( Chemical ( Buyers ( Directory . ) ) ) )
(ROOT (NP (NNP O6) (NNP Chemical) (NNP Buyers) (NNP Directory) (. .)))
O6 Chemical Buyers Directory .
(ROOT (S (NP (CD C6) (JJ h12) (NNS o6)) (VP (VBZ is) (NP (NP (DT the) (JJ chemical) (NN formula)) (PP (IN for) (NP (DT a) (NN glucose) (NN molecule))))) (. .)))