The molecule is the product from the treatment of protoaphin aglucone with protoaphin dehydratase (EC 4.2.1.73). It is an organic polycyclic compound and a hemiketal. It is a conjugate acid of a xanthoaphin(1-).
(7R,9R,10S,12S,18R,20R,21S,23S)-12,16,23,30-tetrahydroxy-7,9,18,20-tetramethyl-8,11,19,22-tetraoxanonacyclo[15.11.1.16,26.02,15.03,12.04,27.05,10.021,29.023,28]triaconta-1(28),2,4(27),5,15,17(29),26(30)-heptaene-14,25-dione