** Shares in Brenntag BNRGn.DE rise around 4% after the German chemicals distributor delivered better than expected quarterly results
** Brenntag posts Q3 operating EBITA of 243 million euros ($283.39 billion), down 14% but above average analysts' forecast of 239.1 million euros in a poll by Vara Research
** J.P.Morgan says the company's results are weak, reflecting the ongoing cyclical and structural pressures in the broader chemical sector, but "better than feared"
** The stock, which has lost 19% YTD up to Tuesday's close, is at the top of Germany's blue-chip .GDAXI index and among the best performers on the pan-European STOXX 600 .STOXX index
** Shares will see their best day since March, if gains hold
($1 = 0.8575 euros)
(Reporting by Ozan Ergenay)
((ozan.ergenay@thomsonreuters.com))