 needles, yield 0.0 g (00%), m.p. 000--000 °C. IR (ν, cm^−0^): 0000 (CH arom.), 0000 (CH aliph.), 0000 (C=O). ^0^H-NMR (000 MHz, CDCl~0~) δ (ppm): 0.00 (s, 0H, CH~0~), 0.00 (s, 0H, CH~0~), 0.00 (s, 0H, CH~0~), 0.00--0.00 (t, 0H, phenyl), 0.00--0.00 (t, 0H, phenyl), 0.00--0.00 (d, 0H, phenyl). ^00^C-NMR (000 MHz, CDCl~0~) δ (ppm): 00.00 (CH~0~), 00.00 (CH~0~), 00.00 (CH~0~), 000.00 (0CH), 000.00 (CH), 000.00 (0CH), 000.00 (C), 000.00 (C), 000.00 (C), 000.00 (C), 000.00 (C), 000.00 (C), 000.00 (C=O). MS: *m*/*z* (000 M^+^). Anal. calcd. for C~00~H~00~N~0~O (000. 00): C, 00.00; H, 0.00; N, 00.00. Found: C, 00.00; H, 0.00; N, 00.00%.  *(0,0-Dimethyl-0-phenyl-0-acetyl-0H-pyrazolo\[0,0-b\]pyrazine)