The present invention provides a novel class of compounds that have the activity of inhibiting HSP90 enzyme and are useful as anti-cancer agents or such, and compounds that are useful as synthetic intermediates thereof. Specifically, the present invention provides compounds represented by the following formula (1), and pharmaceutically acceptable salts thereof:
wherein X, R1, R2, R3, R4, R5, R6, R7, L1, L2, and L3 are as defined in the specification.
The present invention provides a novel class of compounds that have the activity of inhibiting HSP90 enzyme and are useful as anti-cancer agents or such, and compounds that are useful as synthetic intermediates thereof. Specifically, the present invention provides compounds represented by the following formula (1), and pharmaceutically acceptable salts thereof:
wherein X, R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, L
1
, L
2
, and L
3
are as defined in the specification.