beirut syrian national coalition group fight syrian government say wednesday oppose russian-sponsored congress syrian group call attempt circumvent u.n.-backed geneva peace talk aim political transition war-torn country coalition participate negotiations regime outside geneva without u.n. sponsorship snc spokesman ahmad ramadan tell reuters russia call conference syrians sochi attempt circumvent geneva international desire political transition syria accordance u.n. security council resolutions turkey-based snc say syrian opposition snc wont participate russia-sponsored congress spokesman