The Quinacridones is a large family of transparent pigments with high tinting strength, its most widespread member being "printer's magenta", named after the battle of Magenta in 1859 and in the world of watercolor best known as Permanent Rose.
Another member, Quinacridone Gold, has become incredibly popular among Swedish watercolor painters, surprisingly enough after the real pigment was discontinued in 2001 because the car coating industry dropped it.
Daniel Smith was the only paint manufacturer to stack it up before the production ceased, while others imitate it with different blends. For example, Winsor & Newton mixes Nickel Azometine, Quinacridone Maroon, and Gamma Quinacridone for a "Quinacridone Gold" glowing in any gallery out there. Daniel Smith keeps the genuine article as well as a new mixture of Quinacridone Orange and Nickel Azometine.
Quinacridone Orange is even more beautiful, particularly with the new colorless binder Aquazol. Unfortunately that pigment is facing extinction too but I hope the paint makers have learnt a lesson and stockpiled enough for a couple of decades.
Personally I stick to the old earth colors Raw and Burnt Sienna, timeless and in use since 100 000 years ago, but I keep a couple of (real) quinacridones on the side for occasional use.