Corrects to add dropped word "billion" in bullet 3
** India's JB Chem and Pharma JBCH.NS plunges 6.3% to 1,688 rupees
** Larger rival Torrent Pharma TORP.NS to buy controlling 46.4% stake in JBCH from private equity firm KKR at 1,600 rupees per share, an 11% discount to JBCH's closing price on Friday
** Deal also values JBCH at 256.89 billion rupees ($3 bln), a 2.7% discount to its market cap
** Shares of TORP climb 0.6%
** Analysts say JBCH buy would give TORP access to its popular brands including "Rantac", "Metrogyl" and "Sporlac"
** Avg rating on JBCH at "strong buy", while TORP rated "buy" - data compiled by LSEG
** YTD, JBCH down 8.8% vs TORP's 0.3% decline
($1 = 85.4650 Indian rupees)
(Reporting by Kashish Tandon in Bengaluru)
((Kashish.tandon@thomsonreuters.com))