A double bond lacks in the furan ring! see https://pubs.acs.org/doi/10.1021/acs.jafc.0c01373 and https://www.sciencedirect.com/science/article/pii/S0308814624005338
A double bond lacks in the furan ring! see https://pubs.acs.org/doi/10.1021/acs.jafc.0c01373 and https://www.sciencedirect.com/science/article/pii/S0308814624005338