いち酸化 さんか炭素 たんそ中毒 ちゅうどくじゃありませんでした
ichisanka tansochūdokujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 一酸化炭素中毒

1. Was not carbon monoxide poisoning.; Was not due to carbon monoxide poisoning.

Past/Perfective
Negative
Polite
Terminal Form
Medicine