1cP-LSD (1-cyclopropyl-lysergic acid diethylamide) or, as it is also known as Curie Acid, is a molecule of the lysergamide family. 1cP-LSD does not break down into LSD when coming into contact with moisture/water, making it quite stable in humid conditions. This derivative is another LSD prodrug and shares practically indistinguishable pharmacological properties with the parent compound. Likewise, 1cP-LSD will be perfectly suitable as a substitute for 1P-LSD.