Supplier Page from Thermo Fisher Scientific for 3-Isopropoxy-4-(tri-n-butylstannyl)-3-cyclobutene-1,2-dione, 97%
3-Fluorobenzaldehyde, 98+% from Thermo Fisher Scientific
9-Fluorenone, 99+% from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl acrylate, 99.5%, stabilized from Thermo Fisher Scientific