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

MedKoo CAT#: 510296

CAS#: 142878-12-4

Description: U-73343 is a negative control (or inactive analogue) of U73122, which is a putative phospholipase C inhibitor. U73343 was found to inhibit TxA2 formation; it therefore partially inhibited the rise in [Ca2+]i evoked by low concentrations of thrombin, by thapsigargin or by collagen. U73343 had a greater effect than aspirin on the action of collagen, indicating an action on the TxA2-independent component of the signal, via PLC gamma-U73343 lowered TxA2 production by inhibiting the activation of cPLA2, probably at a tyrosine phosphorylation step. U73343 seems to inhibit only the tyrosine kinases involved in the activation of PLC gamma and the generation of TxA2.

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U-73343, purity > 98%, is in stock. The same day shipping after order received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 510296
Name: U-73343
CAS#: 142878-12-4
Chemical Formula: C29H42N2O3
Exact Mass: 466.31954
Molecular Weight: 466.65
Elemental Analysis: C, 74.64; H, 9.07; N, 6.00; O, 10.29

Synonym: U73343, U-73343, U 73343

IUPAC/Chemical Name: 1-(6-(((8R,9S,13S,14S,17S)-3-methoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl)amino)hexyl)pyrrolidine-2,5-dione


InChi Code: InChI=1S/C29H42N2O3/c1-29-16-15-23-22-10-8-21(34-2)19-20(22)7-9-24(23)25(29)11-12-26(29)30-17-5-3-4-6-18-31-27(32)13-14-28(31)33/h8,10,19,23-26,30H,3-7,9,11-18H2,1-2H3/t23-,24-,25+,26+,29+/m1/s1

SMILES Code: O=C(CC1)N(CCCCCCN[C@H]2CC[C@@]3([H])[C@]4([H])CCC5=CC(OC)=CC=C5[C@@]4([H])CC[C@]23C)C1=O

Technical Data

White to off-white solid powder

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

Certificate of Analysis:

Safety Data Sheet (MSDS):

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).

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).

Harmonized System Code:


1: Takenouchi T, Ogihara K, Sato M, Kitani H. Inhibitory effects of U73122 and U73343 on Ca2+ influx and pore formation induced by the activation of P2X7 nucleotide receptors in mouse microglial cell line. Biochim Biophys Acta. 2005 Nov 15;1726(2):177-86. Epub 2005 Aug 15. PubMed PMID: 16122875.

2: Bosch RR, Patel AM, Van Emst-de Vries SE, Smeets RL, De Pont JJ, Willems PH. U73122 and U73343 inhibit receptor-mediated phospholipase D activation downstream of phospholipase C in CHO cells. Eur J Pharmacol. 1998 Apr 10;346(2-3):345-51. PubMed PMID: 9652379.

3: Muto Y, Nagao T, Urushidani T. The putative phospholipase C inhibitor U73122 and its negative control, U73343, elicit unexpected effects on the rabbit parietal cell. J Pharmacol Exp Ther. 1997 Sep;282(3):1379-88. PubMed PMID: 9316850.

4: Heemskerk JW, Feijge MA, Sage SO, Farndale RW. Human platelet activation is inhibited upstream of the activation of phospholipase A2 by U73343. Biochem Pharmacol. 1997 May 9;53(9):1257-62. PubMed PMID: 9214686.

5: Heemskerk JW, Farndale RW, Sage SO. Effects of U73122 and U73343 on human platelet calcium signalling and protein tyrosine phosphorylation. Biochim Biophys Acta. 1997 Jan 10;1355(1):81-8. PubMed PMID: 9030204.