[1]ChemicalandPharmaceuticalBulletin,1991,vol.39,p.2308-2315
[1]ChemicalandPharmaceuticalBulletin,1991,vol.39,p.2308-2315
[1]BioorganicandMedicinalChemistryLetters,1999,vol.9,p.2747-2752
[1]BioorganicandMedicinalChemistryLetters,1999,vol.9,p.2747-2752
[1]BioorganicandMedicinalChemistryLetters,1999,vol.9,p.2747-2752