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Synthesis , crystal structure and biological evaluation of a main group seven - coordinated bismuth ( III ) complex with 2 - acetylpyridine N4 - phenylthiosemicarbazone .
 Chemical: bismuth ( III ); Chemical: 2 - acetylpyridine N4 - phenylthiosemicarbazone
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: bismuth ( III ); Chemical: 2 - acetylpyridine N4 - phenylthiosemicarbazone