From bio- +‎ amine.

bioamine (plural bioamines)

1. Any biochemically-produced amine
   • 2015 September 17, “Quantitative Genetics of Food Intake in Drosophila melanogaster”, in PLOS ONE‎^[1], →DOI:

     These results implicate an evolutionarily conserved pathway integrating metabolic information with bioamine signaling affecting feeding behavior.