| Definition: |
Any of the carbohydrate-containing antibiotic compounds obtained from the deuteromycetous fungus Papularia sphaerosperma and generally consisting of o-orsellinic acid linked via a spirocyclic structure to a lactose moiety with two different side-chains: a shorter fatty-acid chain at the O-(6') position and a longer side-chain at the O-(3) position of the glucose moiety. Papulacandin D, the simplest member of the papulacandin family, lacks the O-(6'-acyl-beta-galactoside) at the O-(4) position of the glucose residue. The papulacandins show potent antifungal activity against Candida albicans, Geotrichum lactis, Saccharomyces cerevisiae, and Pneumocytis carinii, but are inactive against filamentous fungi, bacteria, and protazoa. |