脂環 しかん しき化合 かごう ぶつではありませんでした
shikan shiki kagō butsudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 脂環式化合物

1. Was not a cyclic aliphatic compound.; Was not a cycloalkane.

Past/Perfective
Negative
Polite
Formal Register