11572
Design , synthesis and biological evaluation of novel 7 - mercaptocoumarin derivatives as alpha ( 1 ) - adrenoceptor antagonists .
 Chemical: 7 - mercaptocoumarin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 7 - mercaptocoumarin 
Answer:
 Chemical: 7 - mercaptocoumarin