Ceftazidime pentahydrate is a third generation cephalosporin antibiotic. It has been used to study the penicillin binding proteins, especially PBP3. It has also been used as a selection tool for mutant colonies. Ceftazidime targets gram-negative bacteria, including Pseudomonas aeruginosa and is less effective against gram-positive cocci. It is soluble in acidic and alkali solvents.

Cefteram pivoxil is a semi-synthetic third generation cephalosporin antibacterial that is a prodrug ester of cefteram. It has been seen to express greater bactericidal predominantly against gram-negative bacteria. Cefteram pivoxil has also induced IgE antibody immune responses during in vivo immunology studies.

Cephalosporins are a type of β-lactam antibiotic consisting of a four-membered β-lactam ring bound to a six-membered dihydrothiazine ring. This two-ring system causes distortion of the β-lactam amide bond, resulting in decreased resonance stabilization and increased reactivity. β-lactams inhibit the formation of peptidoglycan cross-links within bacterial cell walls by targeting penicillin-binding proteins or PBPs. Consequently, the bacterial cell wall becomes weak and cytolysis occurs. Cephalosporins are less susceptible to β-lactamases than the penicillin β-lactam antibiotics.

Antibiotics are often used in clinical in vitro tests known as antimicrobial susceptibility tests or ASTs to determine their efficacy against certain bacterial species. They are tested against gram-negative and gram-positive bacteria using panels, discs, and MIC strips by medical microbiologists. ASTs decrease the risk of using an antibiotic against bacteria exhibiting resistance to it, and the results are used in clinical settings to determine which antibiotic(s) to prescribe for various infections.

Ceftibuten is a third generation cephalosporin antibiotic targeting a broad-spectrum of gram-positive and gram-negative bacteria. Ceftibuten is freely soluble in aqueous solution.

Ceftiofur sodium is a third generation cephalosporin antibiotic effective against gram-positive and gram-negative bacteria. Although ceftiofur is resistant to β-lactamase degradation, there are several strains of E. coli known to be unaffected by this antibiotic. It is soluble in aqueous solution.

Ceftizoxime sodium is a third generation cephalosporin antibiotic effective against gram-negative and gram-positive bacteria. It is very soluble in aqueous solution.

Ceftriaxone free acid is a β-lactam cephalosporin compound known for its potent antibiotic activity against gram negative and gram positive bacteria. It also has been observed to cross the blood brain barrier and has been used for both antibiotic and investigative purposes for the central nervous system (CNS).

Ceftriaxone has also been used in vivo for suppressing addictive behavior in rats. Researchers had shown ceftriaxone to upregulate glutamate transporter 1 (GLT1) expression, which diminishes glutamate concentration in synaptic clefts of the CNS. Ceftriaxone has been shown to effectively decrease glutamate levels which prevents hyper-stimulation of glutamic receptors and concurrently withdrawal symptoms.

Ceftriaxone is a third generation cephalosporin antibiotic, which targets gram-negative and gram-positive bacteria. It has been used in proteomics research and to study prophylactic strategies to treat hemolytic anemia caused by prescription medications. In addition, ceftriaxone has been used to study the penicillin binding proteins, especially PBP1. It has been suggested that it also increases EAA2 pump expression in the central nervous system and decreases glutamatergic toxicity. It is freely soluble in aqueous solution.

Cefuroxime is a second generation cephalosporin antibiotic targeting gram-positive and gram-negative bacteria. It exhibits some resistance to β-lactamase activity. Cefuroxime sodium is freely soluble in aqueous solution.

Cellulase R-10, also called Cellulase "Onozuka" R-10, is derived from Trichoderma Viride. Cellulase R-10 is a multi-enzymatic system consisting of various enzymes, including cellulase, hemicellulase, pectinase and protease. Cellulase R-10 is typically used in association with macerozyme R-10 in the decomposition of plant cell walls to produce protoplasts.

Cellulase “Onozuka RS” is produced by a mutant Trichoderma viride that was derived from the parent strain for Cellulase “Onozuka -R-10”. Cellulase RS contains a very high activity of decomposing natural celluloses. This type of cellulase can be used to obtain protoplasts in a very short time and dissolves cell walls of a wider range of plants.

Cephalexin is a first generation cephalosporin antibiotic most effective against gram-positive cocci. However, it also exhibits efficacy against some gram-negative bacilli. In addition, cephalexin has been used to study the penicillin binding proteins, especially PBP3. Cephalexin hydrate is slightly soluble in aqueous solution.

Cephalomannine is an alkaloid compound derived from the plant Cephalotaxus manii and is a precursor of paclitaxel. It is used for its antineoplastic capabilities, which allow it to stabilize and halt microtubule formation during mitosis. Stalling microtubule formation increases Raf-1 expression stimulating downstream apoptotic pathways.