22101
A series of novel 2 - ferrocenyl - 7 - hydroxy - 5 - phenethyl - 5 , 6 , 7 , 8 - tetrahydro - 4H - pyrazolo [ 1 , 5 - a ] [ 1 , 4 ] diazepin - 4 - one derivatives with optical activity ( 2 ) was synthesized in the microwave - assisted condition and characterized by means of IR , ( 1 ) H NMR and mass spectroscopy , and furthermore confirmed by X - ray analysis of a representative compound ( R ) - 2a .
 Chemical: 2 - ferrocenyl - 7 - hydroxy - 5 - phenethyl - 5 , 6 , 7 , 8 - tetrahydro - 4H - pyrazolo [ 1 , 5 - a ] [ 1 , 4 ] diazepin - 4 - one; 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: 2 - ferrocenyl - 7 - hydroxy - 5 - phenethyl - 5 , 6 , 7 , 8 - tetrahydro - 4H - pyrazolo [ 1 , 5 - a ] [ 1 , 4 ] diazepin - 4 - one; Chemical: ( 1 ) H