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Inhibitory effects of metachromins L - Q and its related analogs against receptor tyrosine kinases EGFR and HER2 .
 Chemical: metachromins L - Q; Chemical: tyrosine
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: metachromins L - Q; Chemical: tyrosine