TY - JOUR AU - van Laren, M W; Elsevier, C J JO - Angew. Chem. Int. Ed. VL - 38 PY - 1999 DO - 10.1002/(SICI)1521-3773(19991216)38:24<3715::AID-ANIE3715>3.0.CO;2-O L3 - PubMed-ID: 10649335 SP - 3715 ER -