2(5H)-furanone, 4-methoxy-5-methylene-3-[(7Z,10Z,13Z)-16-[[(3R,3aR,3bR,4S,7R)-octahydro-3,7-dimethyl-4-(1-methylethyl)-1H-cyclopenta[1,3]cyclopropa[1,2]benzen-3-yl]oxy]-7,10,13-hexadecatrienyl]- 3-[16-(4-Isopropyl-3,7-dimethyl-octahydro-cyclopenta[1,3]cyclopropa[1,2]benzen-3-yloxy)-hexadeca-7,10,13-trienyl]-4-methoxy-5-methylene-5H-furan-2-one Artapetalin C InChI=1/C37H56O4/c1-27(2)30-23-22-28(3)37-25-24-36(5,34(37)32(30)37)40-26-20-18-16-14-12-10-8-7-9-11-13-15-17-19-21-31-33(39-6)29(4)41-35(31)38/h7,9-10,12,16,18,27-28,30,32,34H,4,8,11,13-15,17,19-26H2,1-3,5-6H3/b9-7-,12-10-,18-16-/t28-,30+,32-,34+,36-,3 rel-3-((7Z,10Z,13Z)-16-{[(3R,3aR,3bR,4S,7R)-4-isopropyl-3,7-dimethyloctahydro-1H-cyclopenta[1,3]cyclopropa[1,2]benzen-3-yl]oxy}hexadeca-7,10,13-trien-1-yl)-4-methoxy-5-methylenefuran-2(5H)-one