** U.S.-listed shares of Swiss drug developer OBSV.O soar
26.5% to $3.44 premarket - stock among the top gainers across
U.S. exchanges
** Co says it would license the rights to develop and sell
its experimental drug ebopiprant to Organon & Co OGN.N for
$500 mln in upfront payments urn:newsml:reuters.com:*:nGNX223lnj
** ObsEva is also eligible to receive $25 mln to be paid at
signing, up to $90 mln in development and regulatory milestones
and up to $385 mln in sales-based milestone payments
** The drug is being tested as a potential drug for preterm
labor by reducing inflammation and uterine contractions
** Merck & Co Inc MRK.N completed the spin-off of Organon,
which includes some of its assets including women's health
drugs, in June this year
** OBSV shares have risen ~21% YTD
(Reporting by Manas Mishra in Bengaluru)
((Manas.Mishra@thomsonreuters.com;
www.twitter.com/Manasmishra24))