Ilosone

Erythromycin is a macrolide antibiotic which has an antimicrobial spectrum similar to or slightly wider than that of penicillin, and is often used for people who have an allergy to penicillins. For respiratory tract infections, it has better coverage of atypical organisms, including mycoplasma and Legionellosis. It is also used to treat outbreaks of chlamydia, syphilis, acne and gonorrhea. Structurally, this macrocyclic compound contains a 14-membered lactone ring with ten asymmetric centers and two sugars (L-cladinose and D-desoamine), making it a compound very difficult to produce via synthetic methods.
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Erythromycin /eryth·ro·my·cin/ a broad-spectrum antibiotic produced by Streptomyces erythreus; used against gram-positive bacteria and certain [more]Ilosone - Community and Resources

Noun
1. an antibiotic (trade name Erythrocin or E-Mycin or Ethril or Ilosone or Pediamycin) obtained from the actinomycete Streptomyces erythreus; effective against many Gram-positive bacteria and some Gram-negative
(synonym) erythromycin, Erythrocin, E-Mycin, Ethril, Pediamycin
(hypernym) antibiotic, antibiotic drug
(classification) trade name, brand name, brand, marque