硝酸 しょうさんアンモニウムじゃありませんでした
ashōsan'ammoniumujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 亜硝酸アンモニウム

1. Was not ammonium nitrite.; Wasn't ammonium nitrite.

Past/Perfective
Negative
Polite
Terminal Form