I need to locate a company which currently can provide a compound
called "zwitterionic piperazine" for use in cancer therapy. Ideally I
would like email contact details, and they must be a current source,
not a past source of supply

Hello -

"Zwitterionic" means that a compound has multiple charged moeities,
but a net neutral charge.  Amino acids, some phospholipids, some
detergents, and some buffer compounds fit into this category. 
Zwitterionic piperazine derivatives also have a multiple ionizable
groups, but at physiological pH, have a net neutral charge.

One of these compounds, 4-(2 Hydroxyethyl)-1-piperazine ethane
sulfonic acid (HEPES) is a common buffer solution, has been reviewed
in cancer:
http://www.integratedbiologics.com/Research%20articles/clinical_study.htm

and it is available from:
Sigma:
http://www.sigmaaldrich.com/cgi-bin/hsrun/Distributed/HahtShop/HAHTpage/frmCatalogSearchPost?Brand=FLUKA&ProdNo=54457

42 other suppliers:
http://www.biosupplynet.com/cfdocs/products/prod_supp.cfm?prod_id=1929


enrofloxacin is also a zwitterionic piperazine derivative (along with
being a fluoroquinolone antibiotic):
http://www.poultry.baytril.com/index.cfm/page/27/title/Chemistry.htm

Available from:
http://www.riausa.com/pricelist.htm


Let me know if there are other particular zwitterionic piperazines
that you are interested in.

synarchy

Search strategy:
piperazine zwitterionic
hepes