Sigma-Aldrich
Q 98 2-ISOPROPYLNAPHTHO(2,3-B)FURAN-4,9-DIONE
Q134 2,3-BIS(4-METHYLPHENYLTHIO)-1,4-NAPHTHOQUINONE
Q204 2-CHLORO-3-(1-(ETHOXYCARBONYL)-2-OXOPROPYL)-1,4-NAPHTHOQUINONE
Quartz-fused