dibenzo[c,e]-1,1,2,2-tetramethyl-1,2-digermacyclohexa-3,5-diene

1,1-dichloro-3,4-dimethyl-2,5-dihydrogermole

1,1,3-trimethyl-2,5-dihydrogermole

2,2,3,3-tetramethyl-2,3-digerma-1,4-dithiane

5,5,6,6,7,7-hexamethyl-6,7-dihydro-5H-dibenzo[d,f][1,2,3]trigermepine