こう分子 ぶんし物質 ぶっしつじゃなかったです
kōbunshibusshitsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 高分子物質

1. It wasn't a polymer.; It wasn't a macromolecule.

Past/Perfective
Negative
Polite
Casual Register