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