13353
This ECL platform was presented by covalently coupling the 18 - mer amino - substituted oligonucleotide ( ODN ) probes with aldehyde groups that are strongly reactive toward a variety of nucleophiles on the surface of solid substrates .
 Chemical: aldehyde
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: aldehyde