18000
Upon evaluation of the cytotoxic activities of these compounds against leukemia ( HL60 ) , lung ( A549 ) , stomach ( AZ521 ) , and breast ( SK - BR - 3 ) cancer cell lines , nine steviol derivatives , i . e . , 5 - 9 and 11 - 14 , and five isosteviol derivatives , i . e . , 28 - 32 , exhibited activities with single - digit micromolar IC ( 50 ) values against one or more cell lines .
 Chemical: steviol; Chemical: isosteviol
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: steviol; Chemical: isosteviol