生物 せいぶつ がく てき応答 おうとう調節 ちょうせつ物質 ぶっしつでしょう
seibutsu gakuteki ōtōchōsetsubusshitsudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 生物学的応答調節物質

1. Biologically active substance; Bioregulatory substance

Polite
Presumptive
Conjecture