1,1-Dimethoxy-2-methylundecane 2-Methylundecanal dimethyl acetal 68141-17-3 Aldehyde C-12 mna dimethyl acetal Diethyl acetal of aldehyde C-12 NMA EINECS 268-839-7 MNA dimethyl acetal Methyl nonyl acetaldehyde dimethyl acetal Methylnonylacetaldehyde dimethacetal Undecane, 1,1-dimethoxy-2-methyl- alpha-Methyl-alpha-nonylacetaldehyde, dimethyl acetal