3,7,11,15-Tetramethylhexadeca-2,6,10,14-tetraen-1-yl 4-methylpiperazine-1-carboxylate 、
香叶基香叶醇 、
2-氨基吡啶 、
N,N'-羰基二咪唑 以afforded the desired compound 40b in 40% yield (30 mg) as a viscous solid的产率得到(2E,6E,10E)-3,7,11,15-tetramethylhexadeca-2,6,10,14-tetraen-1-yl pyridin-2-ylcarbamate