... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 51, Issue 4, 27 January 2010, Pages 709–713. Cover image Cover image. Acid-mediated activation of modified ring-closing metathesis catalysts. ... 3, 99, 78, 99. 4, 99, 66, 99. 5, 46 (80) c, nr ...