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 ぶっしつではありませんでした
seibutsu gakuteki ōtōchōsetsubusshitsudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 生物学的応答調節物質

1. Was not a biologically active substance.; Was not a biologically responsive modulator.

Past/Perfective
Negative
Polite
Formal Register