Okay, that's a syrup but not one that saves the VitaminC or makes really preserving strength sugar solution.
Basically, look for a wartime recipe for Rosehip syrup that's rich in Vitamin C or follow the no cook version that takes about a month.
Boiling destroys the VitaminC so the wartime recipes call for as little boiling as possible, i.e no reducing of the liquid.
The long term ones don't add any water but simply use the sugar to pull the liquid, vitamins and all, out of the hips.
What you have a recipe for would be better made in very small jars or bottles and used up relatively quickly. Or frozen, as previously suggested.
Tastes good though, doesn't it ?
Excellent on ice cream or over a sponge pudding, or even just by the teaspoonful
cheers,
Toddy