14271
Phosphodiesterases ( PDEs ) degrade cyclic nucleotides , signalling molecules that play important roles in synaptic plasticity and memory .
 Chemical: cyclic nucleotides
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: cyclic nucleotides