Podophyllotoxone

(5R)-5aα,8aβ-Dihydro-5β-(3,4,5-trimethoxyphenyl)furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxole-6,9(5H,8H)-dione

(5R)-5,5aα,8,8aβ-Tetrahydro-5β-(3,4,5-trimethoxyphenyl)furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxole-6,9-dione

(5aR)-5aα,6,8aβ,9-Tetrahydro-9α-(3,4,5-trimethoxyphenyl)furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxole-5,8-dione

(5R)-5β-(3,4,5-Trimethoxyphenyl)-5,8,8aβ,9-tetrahydrofuro[3',4':6,7]naphtho[2,3-d]-1,3-dioxole-6,9(5aαH)-dione

(5R)-5,8,8aβ,9-Tetrahydro-5β-(3,4,5-trimethoxyphenyl)furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxole-6(5aαH),9-dione