Instructions: Given a title, a list of keywords and main findings, create an abstract for a scientific article.
Title: Additional pyrrolomycins from cultures of Streptomyces fumanus.
Keywords: Absolute stereochemistry, Antibiotics.
Main findings: pyrrolomycins G-J (1-4), Pyrroxamycin (5), AL-R2081; Dioxapyrrolomycin; LL-F42248-alpha (6) were isolated from Streptomyces fumanus
Abstract: Write exactly 4 paragraphs each separated with two new lines answering this question. The first paragraph must start with "steps".
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