16474
Previous DEA studies on dialanine have shown that ( M - H ) ( - ) formation proceeds through abstraction of a hydrogen atom from the carboxyl and amide groups , contributing to two distinct resonances at 0 . 81 and 1 . 17 eV , respectively [ D . Gschliesser , V . Vizcaino , M . Probst , P . Scheier and S . Denifl , Chem . - Eur . J . , 2012 , 18 , 4613 - 4619 ] .
 Chemical: dialanine; Chemical: hydrogen; Chemical: carboxyl; Chemical: amide
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: dialanine; Chemical: hydrogen; Chemical: carboxyl; Chemical: amide