( ( ( Stereoisomers Isomers ) ( that ( have ( their atoms ) ) ) ) ( ( ( ( connected ( in ( the ( same order ) ) ) ) but ) ( have ( different ( three-dimensional arrangements ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Stereoisomers) (NNP Isomers)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (NP (PRP$ their) (NNS atoms)))))) (VP (VP (VBN connected) (PP (IN in) (NP (DT the) (JJ same) (NN order)))) (CC but) (VP (VBP have) (NP (JJ different) (JJ three-dimensional) (NNS arrangements)))) (. .)))
Stereoisomers Isomers that have their atoms connected in the same order but have different three-dimensional arrangements.
(ROOT (S (NP (NP (NNS Alkenes)) (PP (IN with) (NP (NP (DT the) (JJ same) (NNS atoms)) (PP (CC but) (NP (JJ different) (NNS shapes)))))) (VP (VBP are) (VP (VBN called) (NP (NNS isomers)))) (. .)))