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Inhibitory effects of metachromins L - Q ( 1 - 6 ) , sesquiterpenoid quinones with an amino acid residue , and their related analogs ( 7 - 18 ) prepared from metachromins A ( 19 ) and C ( 20 ) against receptor tyrosine kinases EGFR and HER2 were investigated .
 Chemical: metachromins L - Q; Chemical: sesquiterpenoid quinones; Chemical: amino acid; Chemical: metachromins; 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: sesquiterpenoid quinones; Chemical: amino acid; Chemical: metachromins; Chemical: tyrosine