飽和 ほうわ炭化 たんか水素 すいそじゃないです
fuhō watanka suisojanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 不飽和炭化水素

1. Not an unsaturated hydrocarbon.; It is not an unsaturated hydrocarbon.

Negative
Polite
Casual Register