放射 ほうしゃ せい指示 しじ やくではありませんでした
hōsha seishi jiyakudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 放射性指示薬

1. Was not a radioactive tracer.; Was not a radiopharmaceutical.

Past/Perfective
Negative
Polite
Formal Register