| Member | Definition | Role |
|---|
| nicotine n-glucuronide | An N-glycosylpyridine that is the N-alpha-D-glucosiduronyl derivative of (S)-nicotine. | (S)-nicotinium N-alpha-D-glucosiduronate |
| ppi-0903 | A cephalosporin having [4-(1-methylpyridinium-4-yl)-1,3-thiazol-2-yl]sulfanyl and {(2Z)-2-(ethoxyimino)-2-[5-(phosphonoamino)-1,2,4-thiadiazol-3-yl]acetyl}amino side groups located at positions 3 and 7 respectively. The N-phospho prodrug of ceftaroline, a broad-spectrum antibiotic active against methicillin-resistant Staphylococcus aureus (MRSA). It is used for the treatment of adults with acute bacterial skin and skin structure infections. | ceftaroline fosamil |
| pyocyanine | An iminium betaine that is 5-methylphenazin-5-ium which is substituted at position 1 by an oxidanidyl group. An antibiotic pigment produced by Pseudomonas aeruginosa. | pyocyanine |
| pyrostatin a | An iminium betaine resulting from a transfer of a proton from the carboxy group to the imino group of 5-hydroxyectoine. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). | 5-hydroxyectoine zwitterion; 5-hydroxyectoine |
| serpentine (alkaloid) | An indole alkaloid that is 18-oxayohimban dehydrogenated at positions 3, 4, 5, 6, 16 and 17 and substituted by a methyl group at the 19alpha position and by a methoxycarbonyl group at position 16. | serpentine |
| trigonelline | An iminium betaine that is the conjugate base of N-methylnicotinic acid, arising from deprotonation of the carboxy group. | N-methylnicotinate |