酵母 こうぼ亜鉛 あえんではありませんでした
kōboaendewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 酵母亜鉛

1. Was not yeast zinc.; Was not a yeast zinc compound.

Past/Perfective
Negative
Polite
Formal Register