A5048002094- Microbial Natural Products and Biosynthesis
- Molecular spectroscopy and chirality
- Marine Sponges and Natural Products
- Spectroscopy and Quantum Chemical Studies
- Insect Utilization and Effects
- Synthesis and Biological Activity
- Computational Drug Discovery Methods
- Neurobiology and Insect Physiology Research
- Protein Structure and Dynamics
IPB University
2021-2024
A merosteroid with a flexible side chain named varicosenone (1a) was isolated from the sea slug Phyllidia varicosa collected Banten, Jakarta, and South Sulawesi, Indonesia. The structure of 1a elucidated using 1D 2D nuclear magnetic resonance (NMR), mass spectrometry (MS) as well density functional theory (DFT)--based NMR calculations. relative configuration for rigid portion (cyclic portion) evidenced by Overhauser effect spectroscopy (NOESY) correlation, while two-chiral centres on were...
Polybrominated diphenyl ether (PBDE) compounds, derived from marine organisms, originate symbiosis between sponges and cyanobacteria or bacteria. PBDEs have broad biological spectra; therefore, we analyzed structure activity relationships of to determine their potential as anticancer antibacterial lead structures, through reactions computational studies. Six known (1-6) were isolated the sponge, Lamellodysdiea herbacea; 13C NMR data for compound 6 are reported first time assignments...
One new acyclic norditerpenoid, lamellodysideol (1) was isolated from the Indonesian marine sponge Lamellodysidea herbacea together with known phytol (2). The structure of 1 determined on basis spectral evidence and by comparison related molecules including optical rotation data. relative configurations 1d 2b were proposed using quantum chemical calculation NMR shifts at DFT levels. In addition, configuration also supported Newman's rule six confirmed through Hehre's protocol. Compounds...
Stereochemical determination of the flexible trinor-guaiane sesquiterpenoid, antheliol (1a) and diterpenoid, sangiangol B (2a), isolated from a marine soft coral, Anthelia sp., was supported by quantum chemical calculations NMR shifts at DFT levels. The relative configuration is now revealed, as 1S*, 4S*, 7S*, 10R* in 1b, whereas (2c) has complete stereochemistry 7R*, 8R*, 10R*, 11R*, 12S*.