2619
The presence of lysine and the major component lauric acid derivative , as indicated by electrospray ionisation - mass spectrometry ( ESI - MS ) direct infusion and nuclear magnetic resonance ( NMR ) spectroscopy , may have contributed to the antibacterial effect of purified PKC fraction .
 Chemical: lysine; Chemical: lauric acid
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: lysine; Chemical: lauric acid