酵素 こうそ てき褐変 かっぺんではありませんでした
kōsotekikappendewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 酵素的褐変

1. Was not enzymatic browning.; It was not enzymatic browning.

Past/Perfective
Negative
Polite
Formal Register