A procedure for the preparation of pseudomonic acid A comprising submerged cultivation of a Pseudomonas bacterium strain capable of biosynthesis of the substantially pure pseudomonic acid A in aerated conditions via fermentation; and isolation of the desired compound is disclosed. A web server receives one or more queries regarding the product from a customer. The front and rear draft stops have portions that protrude beyond the plane of the inner face o the draft sill webs.