N-ForMyl-L-leucine(1S)-1-[(2S,3S)-2-hydroxy-3-[(R)-1-phenylethylcarboMoyl)]nonyl]dodecylEster(OrlistatIMpurity);N-ForMyl-L-leucine(1S)-1-[(2S,3S)-2-hydroxy-3-[(R)-1-phenylethylcarboMoyl)]nonyl]dodecyl-d3Ester(OrlistatIMpurity);OrlistatImpurity;(2S,3R,5S)-5-[(N-Formyl-L-leucyl)oxy]-2-hexyl-3-hydroxyhexadecanoicAcid(OrlistatImpurity);(2S,3R,5S)-5-[(N-ForMyl-L-leucyl)oxy]-2-hexyl-3-hydroxyhexadecanoicacid;OrlistatOpenRingImpurity(2S,3R,5S)-Isomer;OrlistatOpenRing(2S,3R,5S)-Isomer;(2S,3S,5S)-5-<<(S)-2-(Formylamino)-4-methylpentanoyl>oxy>-2-hexyl-3-hydroxyhexadecanoicAcid