Guayulin B

The sesquiterpene guayulin B, C₂₃H₃₀O₃, 1, crystallizes with two independent molecules in monoclinic space group P2₁ with a = 18.099 (1), b = 6.0649(6), c = 19.126(1) Å, = 100.82(1)°, V = 2062.1(5) ų, and Z = 4. The double bonds of the cyclodecadiene ring are E, both methyl groups on the 10-membered ring are -oriented. The cyclopropane ring at C6 and C7 also has the orientation, while the anisoyloxy group is oriented . The 10-membered rings of the two independent molecules have the same conformation as that of guayulin A.