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We have studied the spectroscopic and lasing characteristics of active media based on two synthe sized boron fluoride complexes of alkyl substituted dipyrrolylmethenes and the photostability of the com plexes in comparison with complexes of this kind that were previously studied in the literature under identical excitation conditions. We have determined and analyzed conditions under which new compounds have either merits or drawbacks as compared to the known dye with respect to both lasing efficiency and resource char acteristics.

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