The story of Gotama the Buddha, from the time of his leaving the Tusita heaven until the attainment of his Enlightenment at the foot of the Bodhi-tree, is called Avidūre Nidāna (J.i.2;47-77).
The whole of the story agrees word for word with the account given in the Madhuratthavilāsinī,
Buddhaghosa's Commentary on the Buddhavamsa; possibly they were both drawn from the same source. PLC.125-6.