The Greenpoint is a variation on the Brooklyn (rye, dry vermouth, maraschino liqueur, Amer Picon). It was created at NYC’s legendary Milk & Honey bar by Michael McIlroy in 2006 and named for the Brooklyn nabe. It keeps the same general template of spirit, vermouth, liqueur and bitters, but with a couple changes. It calls for sweet vermouth rather than dry, and the bittersweet cherry-flavored maraschino and the French aperitif Amer Picon are removed in favor of yellow Chartreuse, a French herbal liqueur.

Yellow Chartreuse has been made by Carthusian Monks since 1838 using a closely guarded recipe of 130 herbs, plants and flowers. It, with notes of honey, citrus, anise and saffron, is sweeter and softer than its green sibling. In the Greenpoint cocktail, those flavors merge with rye whiskey’s spicy grain character and the herbal, floral sweet vermouth. Two types of bitters—aromatic and orange—provide additional flavor and structure.

Référence:
https://www.liquor.com/recipes/greenpoint/