How is 13-Methyl-13,14-dihydro[1,3]benzodioxolo[5,6-c][1,3]dioxolo[4,5-i]phenanthridine (CAS: 3606-45-9) typically synthesized?

13-Methyl-13,14-dihydro[1,3]benzodioxolo[5,6-c][1,3]dioxolo[4,5-i]phenanthridine (CAS: 3606-45-9) can be synthesized via a multi-step process involving the introduction of substituents through electrophilic aromatic substitution. Common methods include the use of Williamson ether synthesis for the introduction of the methyl group, followed by ring closure and oxidation steps. The overall yield is moderate, with selectivity towards the desired product being critical.