NOPR Collection: http://nopr.niscpr.res.in/handle/123456789/22259 2026-10-09T09:57:44Z A new lipid glycoside from two <i>sinularia </i>species of Andaman and Nicobar Islands<sup>†</sup> http://nopr.niscpr.res.in/handle/123456789/22579 Title: A new lipid glycoside from two <i>sinularia </i>species of Andaman and Nicobar Islands<sup>†</sup> Authors: Anjaneyulu, V; Rao, P V Subba; Radhika, P; Laatsch, H; Misra, L N Abstract: The more polar fractions of ethyl acetate solubles of <i>Sinularia gravis </i>and <i>Sinularia </i>species yield a new glycolipid and its structure has been deduced as 2-hydroxy-3-(octadecyloxy)-propyl-α-<img src='http://www.niscair.res.in/jinfo/smaller.gif' border=0>-fucopyranoside <b>1</b> from its high resolution spectral data. Page(s): 121-124 2000-02-01T00:00:00Z Two new compounds from <i>Ligularia duciformis</i> http://nopr.niscpr.res.in/handle/123456789/22502 Title: Two new compounds from <i>Ligularia duciformis</i> Authors: Gao, Kun; Jia, Zhong-Jian Abstract: Two new compounds have been isolated from the roots of <i>Ligularia ducifonnis. </i>Their structures have been established by spectroscopic studies and by comparison with closely related compounds. Page(s): 160-161 2000-02-01T00:00:00Z Studies on fused β-lactams: Synthesis, stereochemistry and antimicrobial activity of some new cepham analogues http://nopr.niscpr.res.in/handle/123456789/22501 Title: Studies on fused β-lactams: Synthesis, stereochemistry and antimicrobial activity of some new cepham analogues Authors: Sharma, S D; Saluja, Aarti; Bhaduri, Susmita Abstract: β-Lactam ring has been conveniently grafted onto 2-phenyl-5,6-dihydro-1,3 -thiazine <b>1</b> by annelating it with <i>in situ </i>prepared ketenes to furnish cepham analogues <b>6-9</b>. A variety of acids such as menthoxy acetic acid <b>2</b>, butylthioacetic acid <b>3</b>, chloroacetic acid <b>4</b> and benzotriazole acetic acid <b>5</b> have been used as mixed sulphonic acid anhydrides for the cycloaddition reaction. All the compounds have been screened for their antibacterial activities. Page(s): 156-159 2000-02-01T00:00:00Z Oxazoles : Perturbations by methyl groups http://nopr.niscpr.res.in/handle/123456789/22500 Title: Oxazoles : Perturbations by methyl groups Authors: Rao, B Rajeshwar Abstract: The effect of methyl groups in oxazoles has been studied and the perturbations caused on the oxygen and nitrogen atoms have been rationalized. The Hucke! Molecular Orbital (HMO) method has been used to evaluate the π-electron densities of all the molecules studied. Page(s): 154-155 2000-02-01T00:00:00Z