methane ethane propane butane pentane methanol ethanol 1-propanol 1-butanol 1-pentanol formaldehyde acetaldehyde propanal butanal pentanal lysergic acid diethylamide 2-[4-(2-methylpropyl)phenyl]propanoic acid N-(4-hydroxyphenyl)acetamide methyl 2-phenyl-2-piperidin-2-ylacetate 2,4,6-trinitrotoluene