7-methyl-1,5-dithiaspiro[5.5]undecane

(2R,4R)-2,4,7-trimethyl-1,5-dioxaspiro[5.5]undecane

cyclohexyl cyclohexenylamine

2-oxocyclohexane-1-carbaldehyde

(R,S)-1-hydroxy-2-methylcyclohexanecarboxylic acid