-PELTATIN-A-METHYL ETHER;β-Peltatin A methyl ester;(5R)-5aα,8,8aβ,9-Tetrahydro-10-methoxy-5β-(3,4,5-trimethoxyphenyl)furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxol-6(5H)-one;(5R)-5,8,8aβ,9-Tetrahydro-10-methoxy-5-(3,4,5-trimethoxyphenyl)furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxole-6(5aαH)-one