( Colchicine ( ( ( ( ( inhibits ( spindle formation ) ) , ) and ) ( ( prevents ( separation ( of chromosomes ) ) ) ( at anaphase ) ) ) . ) )
(ROOT (S (NP (NNP Colchicine)) (VP (VP (VBZ inhibits) (NP (JJ spindle) (NN formation))) (, ,) (CC and) (VP (VBZ prevents) (NP (NP (NN separation)) (PP (IN of) (NP (NNS chromosomes)))) (PP (IN at) (NP (NN anaphase))))) (. .)))
Colchicine inhibits spindle formation, and prevents separation of chromosomes at anaphase.
(ROOT (S (NP (JJ Spindle) (NNS fibers)) (VP (VBP pull) (NP (VBN linked) (NNS chromosomes)) (PP (ADVP (RB apart)) (IN in) (NP (JJ anaphase) (NN i.))))))