酵素 こうそ てき褐変 かっぺんじゃなかったです
hikōsotekikappenjanakattadesu

Noun
Desu Copula

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

1. Wasn't non-enzymatic browning.; Wasn't enzymatic browning.

Past/Perfective
Negative
Polite
Casual Register