19664
By comparison of these chemical shifts to those obtained from monomeric BPhe a in solution , it is demonstrated that Phi A in the active branch appears to be electronically close to free bacteriopheophytin .
 Chemical: BPhe a; Chemical: bacteriopheophytin
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: BPhe a; Chemical: bacteriopheophytin