R3Q r3q [(1~{S},2~{S},3~{R},4~{S},7~{R},9~{S},10~{S},12~{R},15~{S})-4,12-diacetyloxy-10,14,16,16-tetramethyl-1,9,15-tris(oxidanyl)-11-oxidanylidene-6-oxatetracyclo[11.3.1.0^{3,10}.0^{4,7}]heptadec-13-en-2-yl] benzoate R3Q