Port wine oxovitisin A, an oxovitisin, a type of pyranoanthocyanin with a 2-pyrone component. Port wine Port wine (also known as vinho do Porto, , Porto, and usually simply port) is a Portuguese fortified wine produced with distilled grape spirits exclusively in the Douro Valley in the northern provinces of Portugal. It is typically a sweet, red wine, often served as a dessert wine, though it also comes in dry, semi-dry, and white varieties. Fortified wines in the style of port are also produced outside Portugal, including in Australia, France, South Africa, Canada, India, Argentina, Spain, and the United States. Under European
Piemonte (wine) the Langhe, Barolo is a big, tannic expression of the Nebbiolo grape. The soil of this area is a composition of clay and marl which helps to lessen the naturally high acidity of Nebbiolo. The Tanaro river flows through the heart of Barolo country and serves as a tempering influence on the region's summertime heat till harvest time in late October/mid November. A small wine region, extending over 7 miles in length and 5 miles at its widest point, Barolo produces about 500,000 cases of wine annually. Nearly 87% of the zone productions comes from vineyards in five communities: Barolo,