2-Sec-butyl-3-methoxypyrazine (SBMP) is a methoxypyrazine that has been detected in ladybirds.

Physicochemical Properties

Molecular Formula	C9H14N2O
Molecular Weight	166.22
Exact Mass	166.11
CAS #	24168-70-5
PubChem CID	520098
Appearance	Colorless to light yellow liquid
Density	1.0±0.1 g/cm3
Boiling Point	230.5±40.0 °C at 760 mmHg
Melting Point	92-94ºC
Flash Point	77.2±0.0 °C
Vapour Pressure	0.1±0.4 mmHg at 25°C
Index of Refraction	1.488
LogP	2.62
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	3
Heavy Atom Count	12
Complexity	130
Defined Atom Stereocenter Count	0
SMILES	O(C([H])([H])[H])C1C(C([H])(C([H])([H])[H])C([H])([H])C([H])([H])[H])=NC([H])=C([H])N=1
InChi Key	QMQDJVIJVPEQHE-UHFFFAOYSA-N
InChi Code	InChI=1S/C9H14N2O/c1-4-7(2)8-9(12-3)11-6-5-10-8/h5-7H,4H2,1-3H3
Chemical Name	2-butan-2-yl-3-methoxypyrazine
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

References	[1]. Headspace gas chromatography-mass spectrometry: a fast approach to the identification and determination of 2-alkyl-3- methoxypyrazine pheromones in ladybugs. .
Additional Infomation	2-methoxy-3-(1-methylpropyl) pyrazine is a member of pyrazines and an aromatic ether. 2-sec-Butyl-3-methoxypyrazine has been reported in Zygaena lonicerae, Zingiber mioga, and other organisms with data available. sec-Butyl methoxypyrazine is a metabolite found in or produced by Saccharomyces cerevisiae.

Solubility Data

Solubility (In Vitro)

DMSO: 100 mg/mL (601.61 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (15.04 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.5 mg/mL (15.04 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Solubility in Formulation 3: ≥ 2.5 mg/mL (15.04 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	6.0161 mL	30.0806 mL	60.1612 mL
	5 mM	1.2032 mL	6.0161 mL	12.0322 mL
	10 mM	0.6016 mL	3.0081 mL	6.0161 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.