22133
Inclusion of the 5 ' - monophosphate group leads to an up to 20 kJ mol ( - 1 ) preference for the syn ( nucleotide ) conformation due to stabilizing base - phosphate interactions involving the amino group of guanine .
 Chemical: 5 ' - monophosphate; Chemical: syn ( nucleotide ); Chemical: phosphate; Chemical: amino; Chemical: guanine
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: 5 ' - monophosphate; Chemical: syn ( nucleotide ); Chemical: phosphate; Chemical: amino; Chemical: guanine