2,9-[2]penteno-5H-furo[2,3,4-ef][3]benzoxepin-5-one, 2,2a,5a,6,7,9,9a,9b-octahydro-10-hydroxy-3,6,9,13-tetramethyl-, (2aS,5aR,6R,9S,9bR,10R,12Z)- InChI=1/C20H28O4/c1-10-5-6-15(22)20(4)19-18-16(12(3)9-23-20)13(21)8-11(2)17(18)14(7-10)24-19/h5,8,12,14-19,22H,6-7,9H2,1-4H3/b10-5-/t12-,14?,15+,16-,17-,18-,19?,20-/m0/s Pachyclavulariaenone D rel-(2aR,5aS,6S,9R,9bS,10S,12Z)-10-hydroxy-3,6,9,13-tetramethyl-2,2a,5a,6,7,9,9a,9b-octahydro-5H-2,9-pent[2]enofuro[2,3,4-ef][3]benzoxepin-5-one