Keywords: DA NbCl5.png Dienophile activation in Diels-Alder reaction en Image N-DA_NbCl5 gif 2005-06-30 V8rik V8rik Diels-Alder reaction Niobium pentachloride Original upload log wikitable - - 2006-10-05 15 18 46 446 × 86 1846 bytes Emw3 <nowiki> Dienophile activation in Diels-Alder reaction en Image N-DA_NbCl5 gif 20050630 V8rik V8rik </nowiki> |