化学 かがく伝達 でんたつ物質 ぶっしつでしょう
kagakudentatsubusshitsudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 化学伝達物質

1. Probably a neurotransmitter.

Polite
Presumptive
Conjecture