1Fe-LSD, also known as 1-(ferrocenecarbonyl)-LSD or as SYN-L-234, is a psychedelic drug of the lysergamide family related to lysergic acid diethylamide (LSD). It is thought to be a prodrug of LSD. The drug was patented by Lizard Labs in 2024. Subsequently, it was encountered online as a novel designer drug being sold in Germany in November 2025. 1Fe-LSD as the hemi-L-tartrate salt has been sold in the form of blotter containing 200μg per tab and micropills containing 300μg per pill. 1Fe-LSD is not an explicitly controlled substance in the United States or in Canada.
1Fe-LSD contains ferrocenyl, an iron substituent. Ferrocene is an orange organometallic compound and its attachment to the LSD molecule is assumed to result in the distinctive orange color of 1Fe-LSD blotter and pills.
See also Substituted lysergamide
References
External links 1Fe-LSD as a new legal derivative in germany based on ferrocene - r/LSD - Reddit "A Statement from the Inventor of 1Fe-LSD (1S-LSD, 1V-LSD, 1cP-LSD etc)" - r/researchchemicals - Reddit