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The contrasting activity of iodido versus chlorido ruthenium and osmium arene azo - and imino - pyridine anticancer complexes : control of cell selectivity , cross - resistance , p53 dependence , and apoptosis pathway .
 Chemical: iodido; Chemical: chlorido ruthenium; Chemical: osmium arene azo - and imino - pyridine
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: iodido; Chemical: chlorido ruthenium; Chemical: osmium arene azo - and imino - pyridine