21521
Here , a main group seven - coordinated bismuth ( III ) complex [ Bi ( L ) ( NO3 ) 2 ( CH3CH2OH ) ] ( 1 ) ( HL = 2 - acetylpyridine N ( 4 ) - phenylthiosemicarbazone ) has been synthesized and characterized by elemental analysis , IR , ( 1 ) H NMR and single - crystal X - ray diffraction studies .
 Chemical: bismuth ( III ); Chemical: Bi ( L ) ( NO3 ) 2 ( CH3CH2OH ); Chemical: 2 - acetylpyridine N ( 4 ) - phenylthiosemicarbazone; Chemical: ( 1 ) H
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: Bi ( L ) ( NO3 ) 2 ( CH3CH2OH ); Chemical: 2 - acetylpyridine N ( 4 ) - phenylthiosemicarbazone; Chemical: ( 1 ) H