TCB2 is an agonist of the serotonin 2A receptor (5-HT2A).

Physicochemical Properties

Molecular Formula	C11H15BR2NO2
Molecular Weight	353.05
Exact Mass	350.947
CAS #	912342-28-0
Related CAS #	(R)-TCB2;912342-36-0
PubChem CID	71433791
Appearance	White to off-white solid powder
LogP	3.723
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	3
Heavy Atom Count	16
Complexity	227
Defined Atom Stereocenter Count	0
InChi Key	TYMMXVZAUGQKRF-UHFFFAOYSA-N
InChi Code	InChI=1S/C11H14BrNO2.BrH/c1-14-9-4-8(12)11(15-2)7-3-6(5-13)10(7)9;/h4,6H,3,5,13H2,1-2H3;1H
Chemical Name	(3-bromo-2,5-dimethoxy-7-bicyclo[4.2.0]octa-1(6),2,4-trienyl)methanamine;hydrobromide
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 Note: Please store this product in a sealed and protected environment, avoid exposure to moisture.
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

Targets	5-HT2A Receptor
ln Vitro	The competitive curve generated with the 5-HT1A receptor agonist ipsapirone from [3H]-8-OHDPAT binding sites in both brain areas is significantly shifted to the right by the selective 5-HT2A agonist TCB2 at 30 nM. With TCB2, there is a notable increase in the mean Ki value, indicating a decrease in the 5-HT2A agonist's affinity for the high-affinity 5-HT1A agonist binding sites in both areas. There are also signs that ketanserin may have opposing effects on the hippocampal tissue[2].
ln Vivo	In C57BL/6J mice, TCB2 (0.5, 1.0, and 2.5 mg/kg) and DOI (0.5, 1.0, 2.5, and 5.0 mg/kg) cause dose-dependent head twitches in comparison to vehicle in an initial dose-response investigation. The amount of head twitches caused by TCB2 and DOI is comparable at all dosages, with the exception that TCB2 causes half as many head twitches as DOI at the highest dose (5.0 mg/kg) (p=0.021). In two distinct experiments, pretreatment with the selective 5-HT2A antagonist MDL 11,939 (1.0 mg/kg) blocked head twitches caused by TCB2 (2.5 mg/kg) and DOI (2.5 mg/kg), confirming that 5-HT2A mediates the head twitch response (p<0.0001). Following TCB2 (5.0 mg/kg, p=0.01; 10.0, p=0.012; with a trend following 2.5 mg/kg, p=0.079) and DOI (10.0 mg/kg, p=0.035), corticosterone levels rise in comparison to vehicle[1].
References	[1]. The serotonin 5-HT(2A) receptor agonist TCB-2: a behavioral and neurophysiological analysis. Psychopharmacology (Berl). 2010 Sep;212(1):13-23. [2]. Existence of Brain 5-HT1A–5-HT2A Isoreceptor Complexes with Antagonistic Allosteric Receptor–Receptor Interactions Regulating 5-HT1A Receptor Recognition. ACS Omega. 2017 Aug 31; 2(8): 4779–4789.

Solubility Data

Solubility (In Vitro)

DMSO: 100 mg/mL (283.25 mM) H2O: 25 mg/mL (70.81 mM)

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *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. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.8325 mL	14.1623 mL	28.3246 mL
	5 mM	0.5665 mL	2.8325 mL	5.6649 mL
	10 mM	0.2832 mL	1.4162 mL	2.8325 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.