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XRD data show that vertical ordering , that is , ordering along surface normal , of CdA multilayer substrates exerts a strong influence in promoting the crystalline growth of rubrene films .
 Chemical: CdA; Chemical: rubrene
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: CdA; Chemical: rubrene