O4139 Sigma-Aldrich


≥98%, solid

Synonym: (−)-Tetrahydrolipstatin, N-Formyl-L-leucine (1S)-1-[[(2S,3S)-3-hexyl-4-oxo-2-oxetanyl]methyl]dodecyl ester, Ro-18-0647

  • CAS Number 96829-58-2

  • Empirical Formula (Hill Notation) C29H53NO5

  • Molecular Weight 495.73

  •  MDL number MFCD05662360

  •  PubChem Substance ID 24724564

  •  NACRES NA.77



Related Categories Approved Therapeutics/Drug Candidates, Bioactive Small Molecule Alphabetical Index, Bioactive Small Molecules, Biochemicals and Reagents, Cancer Metabolism,
Quality Level   100
biological source   synthetic (organic)
assay   ≥98%
form   solid
color   white
mp   <50 °C
solubility   DMSO: 19 mg/mL
originator   Roche
storage temp.   2-8°C
InChI   1S/C29H53NO5/c1-5-7-9-11-12-13-14-15-16-18-24(34-29(33)26(30-22-31)20-23(3)4)21-27-25(28(32)35-27)19-17-10-8-6-2/h22-27H,5-21H2,1-4H3,(H,30,31)/t24-,25-,26-,27-/m0/s1
Gene Information   human ... LIPF(8513), PNLIP(5406)



Orlistat has been used as an inhibitor:
• of fatty acid synthase in long-term estrogen-deprived (LTED) variant cell lines
• of lipase in screening lipase inhibition by raspberry extract
• in in vitro pancreatic lipase activity assay


25, 100 mg in glass bottle

Biochem/physiol Actions

Orlistat impairs intestinal fat absorption and is effective in weight management. It is regarded as a safe drug for treating obesity. It delays the progression of type 2 diabetes mellitus especially in obese and improves glycemic parameters. Long term usage of orlistat results in improved weight reduction and it may not contribute in colorectal carcinogenesis.

Orlistat, used in obesity research, is a pancreatic lipase inhibitor that acts locally in the gastrointestinal tract to inhibit lipase.

Features and Benefits

This compound was developed by Roche. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.

Other Notes

Solution is not completely clear, small particles may remain floating.

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles


Discover Bioactive Small Molecules for Lipid Signaling Research

Within mammalian cells, a multitude of lipid compounds are found with a variety of cellular functions, including structural components of cell membranes and as second messengers in cell signaling pat...
Keywords: Absorption, Atomic absorption spectroscopy, Cancer, Cardiovascular, Cell signaling, Diabetes, Digestions, Diseases, Growth factors, Hormones, Inflammation, Lipid Metabolism, Lipid signaling, Metabolism

Fatty Acid Synthesis and Metabolism in Cancer Cells

Proliferatively active cells require fatty acids for functions such as membrane generation, protein modification, and bioenergetic requirements. These fatty acids are derived either from dietary sour...
BioFiles v7 n4
Keywords: Apoptosis, Cancer, Carboxylations, Catalysis, Citric Acid Cycle, Gene expression, Glycolysis, Metabolism, Oxidations, Phosphorylations

Roar Assay Kits for Studies in Lipoprotein Metabolism

This technical article is a compilation of select fluorescence-based activity assays developed by Roar Biomedical now offered through Sigma-Aldrich in kit format. The methods are well-characterized, ...
Robert Brocia
Roar Biomedical, Inc.
Keywords: Addition reactions, Cardiovascular, Chromatography, Clinical, Detection methods, Drug discovery, Esterifications, Gas chromatography, High performance liquid chromatography, Separation, Thin layer chromatography


LPL Activity Assay Protocol

The kit is sufficient for 100 assays in 200 µL total assay volume. Substrate Emulsion                                    0.125 mL Catalog Number MAK109A LPL Standard, 75.7 mM                         ...
Keywords: Sample preparations

Peer-Reviewed Papers


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