A catechol ring and an alpha-chloroketone make CAS 99-40-1 a compact but versatile gateway to more elaborate organic structures.
HBTU became a peptide-chemistry workhorse by making one of biology's most important bonds faster and more reliable to construct.
SN-38 is the molecular reason an irinotecan prodrug can become a far more potent topoisomerase I inhibitor inside the body.
Ropivacaine turned stereochemistry into a design tool for retaining long local anesthesia while improving the therapeutic profile.
The echinocandin B nucleus shows how fermentation and semisynthesis can share the work of building a complex modern antifungal medicine.
Papaverine is an opium alkaloid whose story is defined not by opioid action, but by direct smooth-muscle relaxation.
Epinephrine bitartrate links one of physiology's classic signaling molecules to the precise salt chemistry required for dependable pharmaceutical use.
Isoproterenol helped transform adrenergic pharmacology from a broad physiological effect into the language of receptor subtypes.
Chloroprocaine's rapid hydrolysis turned a procaine modification into a local anesthetic distinguished by brevity of action.
Small synthetic intermediates can sit quietly behind the construction of medicinal chemistry's most elaborate ring systems.
Rezafungin turned echinocandin chemistry toward a long-acting design compatible with once-weekly intravenous dosing.
DXd embodies the ADC idea: separate targeting from cytotoxic power, then reconnect them through molecular engineering.
A terphenyl acid becomes valuable not as a drug itself, but as the engineered side chain of a far more complex antifungal molecule.
Norepinephrine bitartrate shows how a physiological signal becomes a precisely defined pharmaceutical salt for emergency medicine.
In pharmaceutical process chemistry, an intermediate can be essential to a medicine without ever being the medicine itself.
Voclosporin shows how a one-carbon medicinal-chemistry change can reshape the performance of a celebrated natural-product-derived scaffold.
A familiar scaffold can suggest a question, but only evidence can turn that suggestion into a chemical fact.
From unusual acetylene chemistry to hoses, seals, adhesives and foam: neoprene helped prove synthetic rubber could become a major industrial material.
Some CAS entries describe mixtures, not structures. Pine oil's properties come from a family of terpene components acting together.
One simple salt, three technologies: physiology uses Br-, photography makes AgBr, and spectroscopy exploits KBr's infrared transparency.