When is the active ingredient in Jewelweed (two methoxy-1, four napthoquinine)?

I think you would need to visit a site on herbal medicine or ethnobotany to find this information.

If you can't find the information, guess based on what you know about the plant's reason for making the compound. It is a pigment, so when would this pigment be most useful in the life cycle of the plant?

Sorry I can't help better.

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