// Definition
Sulfur-containing volatile compounds responsible for the pungent, skunky, garlicky, and oniony aromas in cannabis. N-butanethiol-1 (found in actual skunk spray) is one key thiol. These compounds were historically bred out during prohibition because their extreme odor attracted law enforcement attention.
// From the Episode
Abstract Labs discovered long-chain sulfur compounds in cannabis. Bubbleman previously called these 'alcohol-soluble terpenes' because they survived water hash washing while other aromatics washed away. GMO cultivar acts as an 'amplifier' for thiol expression in breeding. Post-legalization, breeders can now safely select for these loud profiles. Brian observed that some cultivars with subdued flower aroma produce amplified hash aroma.