26275
It is further shown that the photochromism of 2 - 4 in conjunction with response of 2Q - 4Q to external stimuli ( acid , heat , and visible radiation ) permits development of molecular logic gates with INHIBIT function .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None