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In order to generate a sufficient immunogenicity of these endogenous structures , usually tolerated by the immune system , these synthetic glycopeptide antigens were conjugated to immune stimulating components : in fully synthetic two - component vaccines either with T - cell peptide epitopes or with Toll - like receptor2 lipopeptide ligands or in three - component vaccines with both these stimulants .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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