FIELD: chemistry. ^ SUBSTANCE: invention discovers derivatives of 5beta-sapogenin and pseudo sapogenin of general formula or , where in general formula I or II: R1 R2, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13 and R15 if available-H, independently R1 and R13-OH or R3-OH, =O or OR, where R - optionally substituted alkyl; lower acyl optinally substituted with carbamonyl or amino or lower alkoxycarbamonyl; lower alkoxycarbamonyl; R14 lower alkyl, optionally double bond with the exception of smylagenin and those compounds of formula I where simultaneously R1= R2= R4= R5= R6= R7= R8= R9= R10= R11= R12= R13=H, R3=beta OH, R14=CH3, and methyl in C20 condition has alpha-orientation and C25 has S-configuration. ^ EFFECT: compounds increases muscarine receptor number and are useful for enhancement of human or animal cognitive function. ^ 12 cl, 17 ex, 5 dwg, 21 tbl
DERIVATIVES OF 5B-SAPOGENIN AND PSEUDO SAPOGENIN AND APPLICATION FOR DEMENTIA MEDICAL TREATMENT