** Shares in Mithra Pharmaceuticals MITRA.BR rise as much
as 3% after its contraceptive drug Estelle, developed together
with Australia's Mayne Pharma MYX.AX , obtains FDA marketing
exclusivity for five years urn:newsml:reuters.com:*:nFWN2ND0X4
** KBC Securities says market exclusivity adds another layer
of protection against possible genericized versions of the drug
** "We expect the key protection to come from the patents
surrounding Estelle and its synthesis pathways until 2032," the
broker adds
** Mayne Pharma was up 2.8% at market close in Australia
((michal.aleksandrowicz@tr.com; piotr.lipinski@tr.com))