( ( ( Subject matter ) ( wherein ( ( the cyclopentanohydrophenanthrene ) ( ring ( containing compound ) ) ) ) ) ( ( contains ( a ( heterocyclic ring ) ) ) . ) )
(ROOT (S (NP (NP (JJ Subject) (NN matter)) (SBAR (WHADVP (WRB wherein)) (S (NP (DT the) (NN cyclopentanohydrophenanthrene)) (VP (VBP ring) (S (VP (VBG containing) (NP (NN compound)))))))) (VP (VBZ contains) (NP (DT a) (JJ heterocyclic) (NN ring))) (. .)))
Subject matter wherein the cyclopentanohydrophenanthrene ring containing compound contains a heterocyclic ring.
(ROOT (S (NP (DT A) (JJ heterocyclic) (NN compound)) (VP (VBZ contains) (NP (NP (NNS atoms)) (PP (IN of) (NP (NP (QP (CD two) (CC or) (JJR more)) (JJ different) (NNS elements)) (PP (IN in) (NP (PRP$ its) (NN ring) (NN structure))))))) (. .)))