This paper is about our efforts to collaboratively determine the structure of a pigment made by a fungus which is an opportunistic pathogen infecting patients who are already infected by the human immunodeficiency virus. When de novo structure determination efforts failed, we used some data from spectroscopic and other techniques and some informed guesses based on the known structure of another pigment, to determine the structure of this pigment, in a partly-sound and partly-speculative exercise

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