Pure absorption gradient enhanced heteronuclear single quantum correlation spectroscopy with improved sensitivity L Kay, P Keifer, T Saarinen Journal of the American Chemical Society 114 (26), 10663-10665, 1992 | 3079 | 1992 |
Ecteinascidins 729, 743, 745, 759A, 759B, and 770: potent antitumor agents from the Caribbean tunicate Ecteinascidia turbinata KL Rinehart, TG Holt, NL Fregeau, JG Stroh, PA Keifer, F Sun, LH Li, ... The Journal of Organic Chemistry 55 (15), 4512-4515, 1990 | 738 | 1990 |
WET solvent suppression and its applications to LC NMR and high-resolution NMR spectroscopy SH Smallcombe, SL Patt, PA Keifer Journal of Magnetic Resonance Series A 117, 295-303, 1995 | 730 | 1995 |
Seaweed resistance to microbial attack: a targeted chemical defense against marine fungi J Kubanek, PR Jensen, PA Keifer, MC Sullards, DO Collins, W Fenical Proceedings of the National Academy of Sciences 100 (12), 6916-6921, 2003 | 341 | 2003 |
Polymer micelle with cross-linked ionic core TK Bronich, PA Keifer, LS Shlyakhtenko, AV Kabanov Journal of the American Chemical Society 127 (23), 8236-8237, 2005 | 319 | 2005 |
High-resolution 1H NMR in solid-phase organic synthesis WL Fitch, G Detre, CP Holmes, JN Shoolery, PA Keifer The Journal of Organic Chemistry 59 (26), 7955-7956, 1994 | 296 | 1994 |
Bioactive bromopyrrole metabolites from the Caribbean sponge Agelas conifera PA Keifer, RE Schwartz, MES Koker, RG Hughes Jr, D Rittschof, ... The Journal of Organic Chemistry 56 (9), 2965-2975, 1991 | 276 | 1991 |
A comparison of NMR spectra obtained for solid-phase-synthesis resins using conventional high-resolution, magic-angle-spinning, and high-resolution magic-angle-spinning probes PA Keifer, L Baltusis, DM Rice, AA Tymiak, JN Shoolery Journal of Magnetic Resonance, Series A 119 (1), 65-75, 1996 | 241 | 1996 |
Influence of Resin Structure, Tether Length, and Solvent upon the High-Resolution (1) H NMR Spectra of Solid-Phase-Synthesis Resins. PA Keifer The Journal of Organic Chemistry 61 (5), 1558-1559, 1996 | 199 | 1996 |
Bioactive compounds from aquatic and terrestrial sources KL Rinehart, TG Holt, NL Fregeau, PA Keifer, GR Wilson, TJ Perun Jr, ... Journal of natural products 53 (4), 771-792, 1990 | 198 | 1990 |
An NMR method to identify nondestructively chemical compounds bound to a single solid-phase-synthesis bead for combinatorial chemistry applications SK Sarkar, RS Garigipati, JL Adams, PA Keifer Journal of the American Chemical Society 118 (9), 2305-2306, 1996 | 184 | 1996 |
Renillafoulins, antifouling diterpenes from the sea pansy Renilla reniformis (Octocorallia) PA Keifer, KL Rinehart Jr, IR Hooper The Journal of Organic Chemistry 51 (23), 4450-4454, 1986 | 148 | 1986 |
Milnamide A, an unusual cytotoxic tripeptide from the marine sponge Auletta cf. constricta P Crews, JJ Farias, R Emrich, PA Keifer The Journal of Organic Chemistry 59 (11), 2932-2934, 1994 | 109 | 1994 |
High-resolution NMR techniques for solid-phase synthesis and combinatorial chemistry PA Keifer Drug Discovery Today 2 (11), 468-478, 1997 | 106 | 1997 |
Direct-injection NMR (DI-NMR): a flow NMR technique for the analysis of combinatorial chemistry libraries PA Keifer, SH Smallcombe, EH Williams, KE Salomon, G Mendez, ... Journal of Combinatorial Chemistry 2 (2), 151-171, 2000 | 89 | 2000 |
The utility of pulsed-field-gradient HMBC for organic structure determination PL Rinaldi, PA Keifer Journal of Magnetic Resonance, Series A 108 (2), 259-262, 1994 | 83 | 1994 |
NMR tools for biotechnology PA Keifer Current opinion in biotechnology 10 (1), 34-41, 1999 | 78 | 1999 |
90° pulse width calibrations: how to read a pulse width array PA Keifer Concepts in Magnetic Resonance: an Educational Journal 11 (3), 165-180, 1999 | 75 | 1999 |
New methods for obtaining high-resolution NMR spectra of solid-phase synthesis resins, natural products, and solution-state combinatorial chemistry libraries PA Keifer Drugs of the Future 23 (3), 301-319, 1998 | 69 | 1998 |
Identification of a novel glycosaminoglycan core-like molecule I: 500 MHz 1H nmr analysis using a nano-nmr probe indicates the presence of a terminal α-galnac residue capping 4 … A Manzi, PV Salimath, RC Spiro, PA Keifer, HH Freeze Journal of Biological Chemistry 270 (16), 9154-9163, 1995 | 69 | 1995 |