25334
This innovation has allowed the discovery that , in addition to 13 ( 2 ) OH chl a and 15 ( 1 ) OH lactone chl a , which are the first products of POD on chl a , the reaction process sequentially creates another series of oxidised chlorophyll derivatives which have not been previously described .
 Chemical: 13 ( 2 ) OH chl a; Chemical: 15 ( 1 ) OH lactone chl a; Chemical: chl a; Chemical: chlorophyll
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: 13 ( 2 ) OH chl a; Chemical: 15 ( 1 ) OH lactone chl a; Chemical: chl a; Chemical: chlorophyll