3d image of cucurbitane skeletal formula

cucurbitane polycyclic hydrocarbon triterpene monoterpenoid terpenoid monoterpene terpene lanostane isomer steroid stereoisomer phytopharmaceutical 3d bioactive phytochemical pathway molecule biology biosynthetic mechanism structural nutraceutica flavonoid intermediate catabolism natural essential oils herb phytotherapy pharmacopoeia antioxidant prescription drug herbal geometry parasympathomimetic biosynthesis molecular biomolecule skeletal healthy aging cell pharmacognosy alternative medicine biological activity herbalism