20651
Mono - and dihydroxy compounds were successfully synthesized from all substrates and the products were characterized by normal phase ( NP ) HPLC , GC - MS , TOF - MS , UV - visible ( UV - vis ) spectroscopy , and NMR spectroscopy .
 Chemical: Mono - and dihydroxy
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: Mono - and dihydroxy 
Answer:
 Chemical: Mono - and dihydroxy