10432
Two series of [ 1 , 2 , 4 ] triazolo [ 3 , 4 - a ] phthalazine and tetrazolo [ 5 , 1 - a ] phthalazine derivatives bearing substituted benzylpiperazine moieties have been synthesized and evaluated for their positive inotropic activity by measuring left atrium stroke volume on isolated rabbit heart preparations .
 Chemical: [ 1 , 2 , 4 ] triazolo [ 3 , 4 - a ] phthalazine; Chemical: tetrazolo [ 5 , 1 - a ] phthalazine; Chemical: benzylpiperazine
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: [ 1 , 2 , 4 ] triazolo [ 3 , 4 - a ] phthalazine; Chemical: tetrazolo [ 5 , 1 - a ] phthalazine; Chemical: benzylpiperazine