macrolides
mancude-ring systems
mancunide-ring systems
Meisenheimer complexes/compounds/adducts
mercaptals
mercaptans
mercaptides
mercaptoles
mero
mesoionic compounds
metal-carbene complexes
metal-carbyne complexes
metallacycloalkanes
metallocenes
molozonides
monosaccharides
monoterpenes
monoterpenoids
monothioacetals
mucopolysaccharides
munchnones
mustards
mustard oils