hexan-2-one 591-78-6 30637-87-7 103004_ALDRICH ZINC02034597 2-HEXANONE 2-Hexanone Methyl n-butyl ketone 2-Oxohexane 4-01-00-03298 (Beilstein Handbook Reference) BRN 1737676 Butyl methyl ketone EINECS 209-731-1 HSDB 543 Hexanone-2 Ketone, butyl methyl Methyl butyl ketone Methyl n-butyl ketone Propylacetone n-Butyl methyl ketone 47733U_SUPELCO 02473_FLUKA InChI=1/C6H12O/c1-3-4-5-6(2)7/h3-5H2,1-2H