11507
The preparation of these aminoalkyl derivatives ( 12a - e , 13a - e , 14a - c , e , 15a - e , 16a - e ) is presented as well as their affinity for DNA which was evaluated by means of DNA thermal denaturation experiments .
 Chemical: aminoalkyl
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: aminoalkyl