A class of organic compounds containing multiple cyclic ether rings that are connected to each other.
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(2R,3S,4aR,6S,7R,9R,9aS)-6-Allyl-7-((2R,3S)-2-allyl-tetrahydro-pyran-3-yloxy)-3,9-bis-benzyloxy-2-benzyloxymethyl-9a-methyl-octahydro-1,5-dioxa-benzocycloheptene
2-(3-benzyloxy-propyl)-2,3-dihydro-pyran-4-one
