Ibutamoren mesylate

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 201684

CAS#: 159752-10-0 (mesylate)

Description: Ibutamoren, also known as MK-677, MK-0667, and L-163,191, is a non-peptidic, potent, long-acting, orally-active, and selective agonist of the ghrelin receptor and a growth hormone secretagogue, mimicking the growth hormone (GH)-stimulating action of the endogenous hormone ghrelin. It has been demonstrated to increase the release of, and produces sustained increases in plasma levels of several hormones including GH and insulin-like growth factor 1 (IGF-1), but without affecting cortisol levels.

Chemical Structure

Ibutamoren mesylate
CAS# 159752-10-0 (mesylate)

Theoretical Analysis

MedKoo Cat#: 201684
Name: Ibutamoren mesylate
CAS#: 159752-10-0 (mesylate)
Chemical Formula: C28H40N4O8S2
Exact Mass:
Molecular Weight: 624.77
Elemental Analysis: C, 53.83; H, 6.45; N, 8.97; O, 20.49; S, 10.26

Price and Availability

Size Price Availability Quantity
1.0g USD 90.0 Same day
2.0g USD 150.0 Same day
5.0g USD 350.0 Same day
10.0g USD 550.0 Same day
20.0g USD 950.0 Same day
50.0g USD 1950.0 2 weeks
100.0g USD 3250.0 2 weeks
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Related CAS #: 159752-10-0 (mesylate)   159634-47-6 (free base)    

Synonym: Ibutamoren; L 163191; L163191; L-163191; MK0677; MK-0677; MK0677; MK677; MK-677; MK 677.

IUPAC/Chemical Name: 2-amino-2-methyl-N-[(2R)-1-(1-methylsulfonylspiro[2H-indole-3,4'-piperidine]-1'-yl)-1-oxo-3-(phenylmethoxy)propan-2-yl]propanamide mesylate.


InChi Code: InChI=1S/C27H36N4O5S.CH4O3S/c1-26(2,28)25(33)29-22(18-36-17-20-9-5-4-6-10-20)24(32)30-15-13-27(14-16-30)19-31(37(3,34)35)23-12-8-7-11-21(23)27;1-5(2,3)4/h4-12,22H,13-19,28H2,1-3H3,(H,29,33);1H3,(H,2,3,4)/t22-;/m1./s1

SMILES Code: CC(C)(N)C(N[C@H](COCC1=CC=CC=C1)C(N2CCC3(CC2)CN(S(=O)(C)=O)C4=C3C=CC=C4)=O)=O.OS(=O)(C)=O

Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 624.77 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Adunsky A, Chandler J, Heyden N, Lutkiewicz J, Scott BB, Berd Y, Liu N, Papanicolaou DA. MK-0677 (ibutamoren mesylate) for the treatment of patients recovering from hip fracture: a multicenter, randomized, placebo-controlled phase IIb study. Arch Gerontol Geriatr. 2011 Sep-Oct;53(2):183-9. doi: 10.1016/j.archger.2010.10.004. Epub 2010 Nov 9. PubMed PMID: 21067829.

2: Bach MA, Rockwood K, Zetterberg C, Thamsborg G, Hébert R, Devogelaer JP, Christiansen JS, Rizzoli R, Ochsner JL, Beisaw N, Gluck O, Yu L, Schwab T, Farrington J, Taylor AM, Ng J, Fuh V; MK 0677 Hip Fracture Study Group. The effects of MK-0677, an oral growth hormone secretagogue, in patients with hip fracture. J Am Geriatr Soc. 2004 Apr;52(4):516-23. PubMed PMID: 15066065.

3: Prahalada S, Block G, Handt L, DeBurlet G, Cahill M, Hoe CM, van Zwieten MJ. Insulin-like growth factor-1 and growth hormone (GH) levels in canine cerebrospinal fluid are unaffected by GH or GH secretagogue (MK-0677) administration. Horm Metab Res. 1999 Feb-Mar;31(2-3):133-7. PubMed PMID: 10226793.

4: Schleim KD, Jacks T, Cunningham P, Feeney W, Frazier EG, Niebauer GW, Zhang D, Chen H, Smith RG, Hickey G. Increases in circulating insulin-like growth factor I levels by the oral growth hormone secretagogue MK-0677 in the beagle are dependent upon pituitary mediation. Endocrinology. 1999 Apr;140(4):1552-8. PubMed PMID: 10098487.

5: Bailey AR, Smith RG, Leng G. The nonpeptide growth hormone secretagogue, MK-0677, activates hypothalamic arcuate nucleus neurons in vivo. J Neuroendocrinol. 1998 Feb;10(2):111-8. PubMed PMID: 9535057.

6: Hickey GJ, Jacks TM, Schleim KD, Frazier E, Chen HY, Krupa D, Feeney W, Nargund RP, Patchett AA, Smith RG. Repeat administration of the GH secretagogue MK-0677 increases and maintains elevated IGF-I levels in beagles. J Endocrinol. 1997 Feb;152(2):183-92. PubMed PMID: 9071975.

7: Jacks T, Smith R, Judith F, Schleim K, Frazier E, Chen H, Krupa D, Hora D Jr, Nargund R, Patchett A, Hickey G. MK-0677, a potent, novel, orally active growth hormone (GH) secretagogue: GH, insulin-like growth factor I, and other hormonal responses in beagles. Endocrinology. 1996 Dec;137(12):5284-9. PubMed PMID: 8940347.

8: Patchett AA, Nargund RP, Tata JR, Chen MH, Barakat KJ, Johnston DB, Cheng K, Chan WW, Butler B, Hickey G, et al. Design and biological activities of L-163,191 (MK-0677): a potent, orally active growth hormone secretagogue. Proc Natl Acad Sci U S A. 1995 Jul 18;92(15):7001-5. PubMed PMID: 7624358; PubMed Central PMCID: PMC41459.

Additional Information

 Related CAS#
CAS#159752-10-0 (Ibutamoren mesylate)
CAS#159634-47-6 (Ibutamoren free base)