(S (S (ADVP (RB However)) (COMMA ,) (S (BASENP (PRP they)) (VP (VBP are) (VP (VBG working) (S (VP (TO to) (VP (VP (VB do) (ADVP (RB so))) (PP (IN with) (NP (NP (BASENP (NNS chemists)) (PP (IN at) (NP (BASENP (DT the) (NNP University)) (PP (IN of) (BASENP (NNP Kentucky)))))) (SBAR (WHNP (WP who)) (S (VP (VBP have) (VP (VBN identified) (NP (BASENP (DT a) (JJ water-soluble) (NN molecule)) (PP (IN with) (BASENP (DT the) (JJ same) (NNS properties))))))))))))))))) (PERIOD .))