Patent ID: 8669244

Claim:
A cucurbitane-triterpenoid compound represented by the following formula (I): wherein a single bond or a double bond is formed between C5 and C10, and a single bond or a double bond is fromed between C8 and C9; when a single bond is formed between C5 and C10, the R 1 is oxygen; while a single bond is formed between C8 and C9, R 2 is carbonyl group (—C═O), methyl hydroxyl group (—CH(OH)), methyl ketone or methyl dimethoxy group (—CH(OCH 3 ) 2 ); and wherein while R 1 is oxygen (—O—) and R 2 is carbonyl group (—C═O) or methyl hydroxyl group (—CH(OH)), a single bond is formed between R 1 (—O—) and C19 of R 2 such that R 1 and R 2 are formed tetrahydro-2H-pyran-2-one or hemiacetal ring.