28422
This includes nonribosomal peptide synthetases ( NRPS ) and polyketide synthases ( PKS ) required for the formation of the benzopyranopyrrole core unit , as well as a suite of tailoring enzymes ( e . g . , four halogenases , an O - methyltransferase , and an N - glycosyltransferase ) necessary for further modifications of the core structure .
 Chemical: benzopyranopyrrole; Chemical: O; Chemical: N
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: benzopyranopyrrole, O, N 
Answer:
 Chemical: benzopyranopyrrole; Chemical: O; Chemical: N