As of my last knowledge update in January 2022, I don't have specific information about the "Rochas Byzance 2019" fragrance. Product releases and availability can change, and new products may have been introduced since then.

For the most accurate and up-to-date information about the "Rochas Byzance 2019" fragrance, including its notes, description, and availability, I recommend checking the official website of Rochas or contacting authorized fragrance retailers. They can provide you with the latest details about this specific fragrance.