27456
Sodium salts of maleamic acid derivatives of lauryl ester of tyrosine ( MTNa ) and phenyl alanine ( MPNa ) in water exhibited strong pH - responsive behaviors of viscosity and specific conductivity that originate from the concentration and pH dependence of their aggregation states .
 Chemical: Sodium; Chemical: maleamic acid; Chemical: lauryl ester; Chemical: tyrosine; Chemical: phenyl alanine
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: Sodium; Chemical: maleamic acid; Chemical: lauryl ester; Chemical: tyrosine; Chemical: phenyl alanine