Guanfu base A

Guanfu base A is an antiarrhythmic alkaloid isolated from Aconitum coreanum and is a potent noncompetitive CYP2D6 inhibitor, with a Ki of 1.20 μM in human liver microsomes (HLMs) and a Ki of 0.37 μM for the human recombinant form (rCYP2D6). Guanfu base A is also a potent competitive inhibitor of CYP2D in monkey (Ki of 0.38 μM) and dog (Ki of 2.4 μM) microsomes. Guanfu base A also inhibits HERG channel current.

Product information

CAS Number: 1394-48-5

Molecular Weight: 429.51

Formula: C24H31NO6

Chemical Name: (1S,3S,5S,8S,9R,11R,14R,16S,17R,18S,19S)-10-(acetyloxy)-9,19-dihydroxy-5-methyl-12-methylidene-7-azaheptacyclo[9.6.2.0¹,⁸.0⁵,¹⁷.0⁷,¹⁶.0⁹,¹⁴.0¹⁴,¹⁸]nonadecan-3-yl acetate

Smiles: C[C@]12C[C@@H](C[C@@]34[C@@H]1[C@@H]1C[C@@]56CC(=C)[C@@H](C(OC(C)=O)[C@]5(O)[C@H]3N1C2)[C@@H](O)[C@@H]46)OC(C)=O

InChiKey: OGNUSOJAYIHLNS-CGMBEVFJSA-N

InChi: InChI=1S/C24H31NO6/c1-10-5-22-8-14-17-21(4)6-13(30-11(2)26)7-23(17)18(22)16(28)15(10)19(31-12(3)27)24(22,29)20(23)25(14)9-21/h13-20,28-29H,1,5-9H2,2-4H3/t13-,14-,15+,16+,17+,18+,19?,20-,21+,22+,23-,24-/m0/s1

Technical Data

Appearance: Solid Power

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

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

Guanfu base A has no inhibitory activity on mouse or rat CYP2Ds. Guanfu base A does not exhibit any inhibition activity on human recombinant CYP1A2, 2A6, 2C8, 2C19, 3A4, or 3A5, but shows slight inhibition of 2B6 and 2E1. Guanfu base A is a potent inhibitor of CYP2D6, with an IC50 recorded at ~0.46 μM in HLM (Dextromethorphan 5 μM) and 0.12 μM in rCYP2D6 (Bufuralol 5 μM). The effects of Guanfu base A is investigated in human embryonic kidney 293 (HEK293) cells transiently transfected with HERG complementary DNA using a whole-cell patch clamp technique. Guanfu base A inhibits HERG channel current in concentration-, voltage-, and time-dependent manners with an IC50 of 1.64 mM. Guanfu base A shifts the activation curve in a negative direction and accelerated channel inactivation but shows no effect on the inactivation curve.

In Vivo:

Beagle dogs treated intravenously with Dextromethorphan (2 mg/mL) after pretreatment with Guanfu base A injection shows reduced CYP2D metabolic activity, with the Cmax of dextrorphan being one-third that of the saline-treated group and area under the plasma concentration-time curve half that of the saline-treated group.

Products are for research use only. Not for human use.