氨气

(S)-2-(1,6,7,8-tetrahydro-2H-indeno[5,4-b]furan-8-yl)ethyl methanesulfonate

(E)-ethyl 3-(5-(2-methyl-1,3-dioxolan-2-yl)-2,3-dihydrobenzofuran-4-yl) acrylate