What's the plural form of withanolide? Here's the word you're looking for.
Answer
The noun withanolide can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be withanolide.
However, in more specific contexts, the plural form can also be withanolides e.g. in reference to various types of withanolides
or a collection of withanolides.