How did you search ring closed compounds derived from prenyl groups? What types of ring closed compounds do you assume come from prenyl groups?

Project description
Hi ,
I already carry out a literature search on natural product compounds that contain a prenyl group 2-methyl-2-butene and my teacher said to me do the report for that and I already done with it but he need some questions i should add it like the answer in my report . he said to me via email coz i sent my report to him so he said , can you please clarify how you did the searches?
What keyword did you enter?
Did you use a structure fragment search?
How many papers were searched?
It is not cleat how prevalent prenyl groups are in nature compare to other functional groups in natural products, please clarify.
How did you search ring closed compounds derived from prenyl groups?
What types of ring closed compounds do you assume come from prenyl groups?

for this literature search i just used google for that and the program called scifinder i search and found many paper related in my topic . so i just need help for this the answer in my report and review it in a good way
i will attached my literature search and my report also
thanks

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