ジアセチルモルヒネではありませんでした
jiasechirumoruhinedewārimasendeshita

Noun
Desu Copula

The polite, past negative form of ジアセチルモルヒネ

1. Was not diacetylmorphine.; Was not heroin.

Past/Perfective
Negative
Polite
Formal Register