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Figure 2 HPLC chromatograms of(l), (2) and (3) in acetonitrile solution.

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Figure 2 HPLC chromatograms of(l), (2) and (3) in acetonitrile solution.

Table 2 The loss in HPLC peack area of (J), (2) and (3) in the solid state

(1)

(2) form I

(2) form II

(3)

% HPLC main peak area loss after 4 hours ca. 10%

ca.100%

ca. 4%

ca.10%

in xenon light*

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