3d image of azulene skeletal formula

azulene isomer naphthalene bicyclo decapentaene organic compound blue lotion cream terpenoid vetivazulene guaiazulene pigment mushrooms guaiac wood oil chromophore azure-blue synthesis organometallic complexes chemistry ligand metal center low-valent metal complexes keto–enol tautomerism tautomer stereoisomer orbital structure activity relationship sar racemate molecule molecular formula skeletal structural structure geometry ball stick substance material component agent stuff reaction production 3d