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

Noun
Desu Copula

The polite, past negative form of 非酵素的褐変

1. Was not non-enzymatic browning.; Was not non-enzymatic darkening.

Past/Perfective
Negative
Polite
Formal Register