放射 ほうしゃ せい指示 しじ やくじゃないです
hōsha seishi jiyakujanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 放射性指示薬

1. It's not a radiotracer.; It isn't a radiotracer.

Negative
Polite
Casual Register