This chain contains weakness. The hadith of Sayyiduna Abu Hurayrah and Sayyiduna Imran (may Allah be pleased with them both) concerns several lapses of forgetfulness occurring together for the Prophet (peace and blessings be upon him), and his (peace and blessings be upon him) limiting himself to only two prostrations contradicts this hadith.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3823