PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18330601-1 2008 Hetero-Diels-Alder (HDA) reaction of methyl glyoxylate with buta-1,3-diene has been investigated using multireference methods (complete active space SCF and multi-reference perturbation theory) and compared with several single-reference methods (including DFT) often used in calculations of catalysed [4+2] cycloadditions. 1,3-butadiene 60-74 KIT ligand Homo sapiens 149-152 26580907-9 2015 Finally, in order to test the new algorithm on MRCI matrices, we have calculated the ground state and the pi pi* excited state of the butadiene molecule, starting from both SCF and CASSCF wave functions. 1,3-butadiene 136-145 KIT ligand Homo sapiens 175-178