( ( In glycolysis ) ( , ( ( glucose ( -LRB- ( C6 -RRB- ) ) ) ( ( is ( split ( into ( two ( ( 3-carbon ( -LRB- ( C3 -RRB- ) ) ) ( pyruvate molecules ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NNS glycolysis))) (, ,) (NP (NP (NN glucose)) (PRN (-LRB- -LRB-) (NP (NNP C6)) (-RRB- -RRB-))) (VP (VBZ is) (VP (VBN split) (PP (IN into) (NP (CD two) (ADJP (ADJP (JJ 3-carbon)) (PRN (-LRB- -LRB-) (NP (NNP C3)) (-RRB- -RRB-))) (JJ pyruvate) (NNS molecules))))) (. .)))
In  glycolysis, glucose (C6) is split into two 3-carbon (C3) pyruvate  molecules.
(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))))) (. .)))