The molecule is a naphthopyran that is 3,4-dihydronaphtho[2,3-c]pyran-1-one which is substituted by a (2R,4R)-2,4,9-trihydroxynonyl group at position 3 and a methoxy group at position 7. Published in Acta Pharm. Sin. B, 2013, 3, 163-166. See also J. Antibiot., 2011, 64, 503-508. It is an aromatic ether, a member of phenols, a delta-lactone, a secondary alcohol, a primary alcohol and a naphtho-alpha-pyrone.
(3S)-9,10-dihydroxy-7-methoxy-3-[(2R,4R)-2,4,9-trihydroxynonyl]-3,4-dihydrobenzo[g]isochromen-1-one