5'alpha-benzyl-12'-hydroxy-2'-methylergotaman-3',6',18-trione maleate
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5'alpha-benzyl-12'-hydroxy-2'-methylergotaman-3',6',18-trione maleate ?? ??
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5'alpha-benzyl-12'-hydroxy-2'-methylergotaman-3',6',18-trione maleate ?? ??: