14780
Steady - state , time - resolved fluorescence and electrospray ionisation mass spectrometry ( ESI - MS ) studies provide evidence for the formation of both 1 : 1 and 2 : 1 ( CB7 . CPT ) stoichiometries .
 Chemical: CB7; Chemical: CPT
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: CB7; Chemical: CPT