Here are some Iâve found on the subject of art and art history. â 1  Art is not what you see, but what you make others seeâ -Edgar Degas. â 2 Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seenâ â Leonardo Da Vinci.
Other forms of vitamin B 3 include the corresponding amide and nicotinamide (niacinamide), where the carboxyl group has been replaced by a carboxamide group (CONH 2), as well as more complex amides and a variety of esters.
Niacin is a water-soluble B vitamin vitamin B3 - and the common name for 2 very different compounds: nicotinic acid and niacinamide. High doses of niacin (as nicotinic acid) can lower cholesterol levels (although the exact mechanism of action is still not known).iacin is a water-soluble B vitamin vitamin B3 - and the common name for 2 very different compounds: nicotinic acid and niacinamide. High doses of niacin (as nicotinic acid) can lower cholesterol levels (although the exact mechanism of action is still not known).