Chemistry 1301A/B and 1302A/B or Chemistry 1100A/B and 1200B, or the former Chemistry 1050.
4.0 courses from: Biochemistry 2280A, Biology 2290F/G, 2581B, 3466B, 3592A, 3593B, 3594A, 3595A, 3596A/B, 3597A/B, 4540G, 4561F, 4562B, 4970F/G (only if taken prior to September 2006), the former 387F, 390a, 391b, 451F/G.