amidopyrine vs aminopyrine

amidopyrine and aminopyrine both are nouns.

Word	Noun	Adjective	Verb	Adverb
amidopyrine	Yes	No	No	No
aminopyrine	Yes	No	No	No

As nouns, amidopyrine and aminopyrine are synonyms defined as:

amidopyrine and aminopyrine: a white crystalline substance used as an analgesic and antipyretic

amidopyrine (noun)	aminopyrine (noun)
a white crystalline substance used as an analgesic and antipyretic	a white crystalline substance used as an analgesic and antipyretic