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Pronunciation varies by accent · noun
(organic chemistry) A highly toxic sesquiterpene lactone found in Arnica montana and Arnica chamissonis subsp. foliosa..
Use helenalin when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Helenalin means (organic chemistry) A highly toxic sesquiterpene lactone found in Arnica montana and Arnica chamissonis subsp. foliosa..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use helenalin where its definition matches the intended context.
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