| 摘要 |
PCT No. PCT/US92/05435 Sec. 371 Date Jan. 2, 1994 Sec. 102(e) Date Jan. 2, 1994 PCT Filed Jul. 1, 1992 PCT Pub. No. WO93/03030 PCT Pub. Date Feb. 18, 1993.This invention relates to compounds of the formula <IMAGE> (I) wherein R1, R2, R3, R4, R5, R6 and R7 are as defined hereinbelow that exhibit activity as immunostimulants.
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