(2S,6S)-2,6-dimethyl-4-[2-methyl-3-[4-(2-methylbutan-2-yl)phenyl]propyl]morpholine; Mixture of (2RS,6RS)-2,6-Dimethyl-4-[(2R)-2-methyl-3-[4-(2-methylbutan-2-yl)phenyl]propyl]morpholine and (2RS,6RS)-2,6-dimethyl-4-[(2S)-2-methyl-3-[4-(2-methylbutan-2-yl)phenyl]propyl]morpholine